# CVE-2026-63209: Integer Overflow or Wraparound and Out-of-bounds Write in compress > An attacker can cause a denial of service by triggering an integer overflow that leads to an out-of-bounds write and process crash in the compress library. - **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`) - **Exploited in the wild:** Not known - **Login needed:** Not needed - **Attackable:** Over the internet - **Victim action needed:** Not needed - **Fix available:** Yes - **Published:** 29 Sep 2026 - **Updated:** 29 Sep 2026 - **Also known as:** AZL-105534, AZL-105906, CLEANSTART-2026-AH15669, CLEANSTART-2026-CC29276, CLEANSTART-2026-IP24198, CLEANSTART-2026-IQ41446, CLEANSTART-2026-JR00153, CLEANSTART-2026-KW79982, CLEANSTART-2026-OX02272, CLEANSTART-2026-UW32521, CLEANSTART-2026-WM90638, CLEANSTART-2026-XR10433, CLEANSTART-2026-YS81054, CLEANSTART-2026-ZG20556, DEBIAN-CVE-2026-63209, ECHO-a97f-7389-9982, GHSA-259r-337f-4rfw, GO-2026-5841, MINI-2243-7wmj-m76r, MINI-22qq-vffw-22x4, MINI-23xv-m69m-hjw9, MINI-23xx-wf79-x5wf, MINI-244p-3x76-9gv3, MINI-24h4-wjch-9gxh, MINI-24mw-xcm4-86f7, MINI-25c3-3jqr-h2g6, MINI-25gr-c2v9-mmcv, MINI-25qv-pf4c-p695, MINI-264x-48pq-7xcx, MINI-26pr-rwf7-3rg7, MINI-26rm-hcjv-92r2, MINI-26v9-4xjj-6qh7, MINI-27r3-6vrq-3ccr, MINI-27vh-phgq-6mgh, MINI-28v3-h996-p4wf, MINI-292c-q2vc-crm7, MINI-296c-9m67-m9fq, MINI-2972-48wq-cq62, MINI-299c-g79x-qw9m, MINI-29mx-mxf7-q6cx, MINI-29q3-8p63-j7gg, MINI-2c28-488g-jrx2, MINI-2c6x-xhr2-4ppj, MINI-2c7p-p6wm-2mqv, MINI-2cp9-6fvm-3q8v, MINI-2cpm-f8p5-377r, MINI-2f97-2vp6-xjp3, MINI-2fqx-jwrq-cqwx, MINI-2g68-wh7r-rfc2, MINI-2gxg-ch5f-9p3g, MINI-2gxg-cr39-vp4f, MINI-2jhq-w8qr-4gg8, MINI-2jm9-g4gh-qx97, MINI-2m45-ggpw-p76c, MINI-2m7g-q27g-h75g, MINI-2m7p-m7p4-85rr, MINI-2mc6-xmrv-hhvq, MINI-2mjq-8vjp-rcjc, MINI-2pjq-p486-gr37, MINI-2q9j-28wc-q83x, MINI-2qfr-99gm-43xr, MINI-2qm8-95f8-5x8p, MINI-2qp7-chmg-4293, MINI-2rc3-wp2x-9vv7, MINI-2rcf-rr9g-gc92, MINI-2v74-8j2f-93gq, MINI-2vhx-6pm3-5822, MINI-2vjf-xrf4-945c, MINI-2vqg-rfch-x4vp, MINI-2wqh-7xgx-gqmq, MINI-2x7p-p5xq-grc6, MINI-2xch-rw6r-wg49, MINI-2xj2-x5rg-9q4h, MINI-2xmf-9rw9-cxjx, MINI-324f-jgf4-57h2, MINI-32q5-mgg7-c2mm, MINI-33p9-hm4g-vqmh, MINI-3447-gw27-mq3h, MINI-35c2-8x93-5j5h, MINI-35c8-vw4p-hg2j, MINI-35j3-35jc-v98f, MINI-35rp-x93m-r5fq, MINI-36gp-pv8w-rfcm, MINI-36mp-jhc9-jxxm, MINI-37c8-6w84-q8v2, MINI-3844-r72v-93v4, MINI-3c47-mw73-gp64, MINI-3fhp-w3p3-r5h6, MINI-3fj6-37h4-jw39, MINI-3gfv-5w2h-jc2p, MINI-3h49-r9rv-36g5, MINI-3h87-cffc-vm5g, MINI-3hpp-mc2m-g899, MINI-3m69-c84j-pfrh, MINI-3pf2-p4vm-q2w8, MINI-3pp9-7c4v-3572, MINI-3qp5-q729-q5c4, MINI-3qqx-mp5w-pg2h, MINI-3r5p-p36v-wq9h, MINI-3r6f-j3c2-46pj, MINI-3v94-3hg5-wfvg, MINI-3wh5-5j8p-fqrh, MINI-3ww6-m6fw-vccp, MINI-3xgg-j6mr-f23r, MINI-3xj6-9pjq-qqff, MINI-427q-4p3r-wq5m, MINI-43mq-6w4f-564r, MINI-45cm-2g55-932m, MINI-45fp-x6v2-grcr, MINI-4645-rwvw-cjpx, MINI-472p-7g8m-cq5w, MINI-472r-p249-wpx5, MINI-4744-9cj7-hvxv, MINI-48wc-wr62-3748, MINI-4973-858m-22j2, MINI-498c-9w7x-v8hj, MINI-49jp-wrvx-8q8m, MINI-4c58-qvpp-vjhq, MINI-4ch7-p5rh-pxf9, MINI-4cq3-24xq-jj2c, MINI-4f22-7p2m-5xwr, MINI-4fqh-773x-vfx6, MINI-4frx-fx85-cvvm, MINI-4gg5-7mwx-mq9p, MINI-4hpj-qq6x-7mww, MINI-4hq7-w6cg-j5fr, MINI-4jf7-7rh8-gwjv, MINI-4jh9-2cw6-g26c, MINI-4jhg-c82f-63ff, MINI-4mc6-qq2c-cwp7, MINI-4p87-m659-2g52, MINI-4prj-ph7r-v282, MINI-4qpc-m46g-569c, MINI-4qxr-4ccw-gf95, MINI-4r7j-j9jc-96g6, MINI-4r9m-mqw6-7cqf, MINI-4rfv-vc7q-g97c, MINI-4v35-gm7m-fcjw, MINI-4v64-qmjj-h3g9, MINI-4vrx-rjf8-9fp2, MINI-4vvr-v6gr-42pm, MINI-4wfp-v983-r2f4, MINI-4wjf-2wjm-q4hp, MINI-4wv5-5w87-8hg7, MINI-4xgc-c5pf-hmfw, MINI-4xrc-5w4h-qqg9, MINI-524h-9hfg-4qmr, MINI-52pr-5wjg-m6qh, MINI-52q5-xw75-gq98, MINI-52wp-vpj8-72r7, MINI-5354-w5qr-725x, MINI-53fw-q3c7-q9r6, MINI-544c-8jqp-7rw9, MINI-546g-g342-v74c, MINI-5559-4wxg-h424, MINI-55gx-rxg6-rmh3, MINI-566f-94fw-j3c4, MINI-56gh-28pm-76q4, MINI-5742-vvpf-839p, MINI-579m-6xw4-ghx4, MINI-57jr-p9qc-vprr, MINI-57v8-j348-x978, MINI-57vc-5pfr-hq73, MINI-5825-7r8v-p2mf, MINI-59fw-v5p3-q8gx, MINI-5ch4-fj85-hvqg, MINI-5f42-cf7m-cc2p, MINI-5fj3-3w2m-hcgh, MINI-5g2r-hr59-mxhw, MINI-5g86-2fjw-mgpv, MINI-5hq7-7j8j-5m93, MINI-5hx2-55c8-fgrc, MINI-5jjp-725w-vjcx, MINI-5jww-6pr9-vfhm, MINI-5m6p-3w63-g5pf, MINI-5mjc-pp62-fhfm, MINI-5mx6-qq2p-66g4, MINI-5px2-5533-w4cm, MINI-5qf2-xwww-h8h8, MINI-5qfq-j6mc-9vv3, MINI-5rc3-924r-j2f7, MINI-5rjf-3569-3p8q, MINI-5rw7-3562-pj9m, MINI-5vpr-f5x8-9589, MINI-5w95-4hhg-pfff, MINI-5x37-qwgq-qm5f, MINI-5xhp-g2f4-q2cv, MINI-5xjv-59qm-mrjq, MINI-5xvp-hmxf-phqj, MINI-629h-rfrm-6pr9, MINI-63q2-589p-499g, MINI-64vc-w3fq-rfxg, MINI-65h5-45c4-xphc, MINI-66jh-9jrw-gw49, MINI-66vh-64pj-ghwf, MINI-67cq-q39w-m5f6, MINI-67p4-xj4j-4qqx, MINI-682r-63wf-7rvg, MINI-686g-6p4m-8jqm, MINI-68f2-98pm-xwr7, MINI-6c2q-p93h-r3p7, MINI-6c86-95w6-jmjv, MINI-6c9h-7f53-94h8, MINI-6f2v-pv78-qrqf, MINI-6f4c-48w9-r432, MINI-6f5h-hmp7-ppqv, MINI-6f5v-cv6j-f28j, MINI-6fww-72mh-hw6w, MINI-6g5h-847p-455q, MINI-6gx2-vqj3-rq2w, MINI-6m66-c27q-3p3x, MINI-6mx8-pq62-gfg9, MINI-6p23-wc3q-m4hr, MINI-6pvf-8xc7-jv64, MINI-6r3h-q4p4-r4cp, MINI-6vx8-54mr-fg9w, MINI-6w9r-jx42-rrc5, MINI-6wm8-g75q-cmm4, MINI-6wmc-4r3g-9x9j, MINI-6x33-7pg4-g72j, MINI-6xcr-wrr9-65j5, MINI-7355-4g74-vrc9, MINI-739v-m8hj-wgmm, MINI-74gm-x27q-pw8c, MINI-74xw-wvp6-x357, MINI-75fm-vc8c-55w8, MINI-75r7-7cvr-p76x, MINI-762j-fhw8-83rv, MINI-762v-5x6v-vrf6, MINI-7766-gmmm-gc9p, MINI-7788-37jr-7p85, MINI-77mj-g239-crp3, MINI-784f-433f-wpwg, MINI-78q3-gpxr-9mx8, MINI-78q5-98xx-3w4q, MINI-7933-35xw-4mpf, MINI-7974-896w-6fcv, MINI-79gw-mm5f-26jc, MINI-79q6-rr56-vhp5, MINI-7f7v-8696-xwfx, MINI-7fcj-xcvh-jxq9, MINI-7g64-j8m9-mrgg, MINI-7g6q-559x-gcrj, MINI-7g8c-j3mw-wjxm, MINI-7gfp-5xmx-p57c, MINI-7gr2-944g-mh5v, MINI-7grx-5x77-ghw2, MINI-7gxp-wg7f-8qrr, MINI-7hmr-4crf-8mwg, MINI-7hq8-629m-x3j7, MINI-7hrm-vcwm-vh76, MINI-7j7f-325c-7qr5, MINI-7m9h-p5xw-vwq2, MINI-7mfm-6mfh-v624, MINI-7mfm-q5hf-w26c, MINI-7q2j-824c-xxcq, MINI-7q5h-3m4g-x84v, MINI-7qf7-2q9q-5hjw, MINI-7qhv-g5w4-gqr9, MINI-7qwq-8849-8v94, MINI-7r53-qh44-c8jg, MINI-7rcp-pwjx-rh52, MINI-7rqh-3wj8-j3f3, MINI-7vv4-h755-j34c, MINI-7vv5-5fgx-5qpp, MINI-7w88-4rw3-93mm, MINI-7x7m-75gr-33x7, MINI-7xv4-4vgv-gcg4, MINI-7xx2-7rv5-vc7x, MINI-7xxr-97c3-hvfr, MINI-823f-qc4v-4494, MINI-82vh-9j5f-95qw, MINI-834c-c75w-72v9, MINI-83w5-jjwm-v6jm, MINI-84w8-jq7g-h2f9, MINI-85vq-9q9r-428m, MINI-86rg-qg76-4vcf, MINI-875x-xhmq-3773, MINI-876m-x3ch-wgvf, MINI-87jc-phff-p8pp, MINI-87jx-rgp8-5wmm, MINI-87x5-vc46-4cjg, MINI-88gv-9cq6-fphw, MINI-88vx-5cp4-mw3r, MINI-88w9-4pgg-58g6, MINI-89v9-cwf3-hmw3, MINI-89wh-8f5c-6qvp, MINI-8cm4-j4ch-5jx9, MINI-8f68-p5x8-7xq7, MINI-8f99-c4q6-72px, MINI-8gj6-jr9p-3386, MINI-8gq3-6q9w-2qgx, MINI-8gxf-52jg-gjvp, MINI-8h65-9652-vxhm, MINI-8h9f-mqfq-cf99, MINI-8hjr-qrrr-mrrp, MINI-8j84-chw4-37m6, MINI-8jgg-x4c3-pgg6, MINI-8jwj-3whc-2953, MINI-8m37-8gxm-f59j, MINI-8m66-q3cg-h7g7, MINI-8mvg-wmp7-v76f, MINI-8mw5-88j3-rv2r, MINI-8p36-w76j-wm7v, MINI-8p43-5qxq-wpgp, MINI-8qc5-23ff-x8pr, MINI-8qhj-2w27-8hgq, MINI-8r4q-3jp5-6pm4, MINI-8rcm-23vg-vhjp, MINI-8v3w-v46f-x7v3, MINI-8vc4-m73r-rqg4, MINI-8vm9-jrq2-h2rp, MINI-8w53-vp9j-c67q, MINI-8w74-rr2r-79xq, MINI-8w8c-2hg4-4mww, MINI-8wx6-h8hx-7fr4, MINI-8wx8-qjwm-g5q6, MINI-8x3p-9587-2w49, MINI-9254-c96p-xvhm, MINI-928f-3pxw-pv67, MINI-92ff-hffj-4g39, MINI-932r-mmg8-fhqc, MINI-93mx-qmfj-hv35, MINI-94mh-35fp-44w9, MINI-958h-6gc8-4qp5, MINI-9655-w7r4-c62c, MINI-965j-6p43-wf2g, MINI-966w-3623-q2q2, MINI-96fj-66jr-83q9, MINI-96w4-6rmg-vq5c, MINI-972p-8p84-22pp, MINI-979f-xq7v-vp6q, MINI-97h6-vrcj-5rhr, MINI-97w7-mgfq-vf96, MINI-98pv-xx9m-w2r4, MINI-98rh-5mc5-rf8v, MINI-995h-5wq8-pjv2, MINI-99r8-33rw-58h3, MINI-9cp5-46pp-2f3c, MINI-9cq5-vm8f-48fp, MINI-9f57-7593-mf37, MINI-9fg4-rp38-cg7v, MINI-9fg8-38gq-c2q8, MINI-9g9h-cpqm-m3vq, MINI-9gmj-5wx9-4r5c, MINI-9h25-342p-j45x, MINI-9h2g-jgj2-6fvg, MINI-9h48-cwhx-9g2c, MINI-9hpw-22fh-fqv7, MINI-9j4p-g84f-cr63, MINI-9jv9-2cg6-x9v7, MINI-9mgr-wvj2-w3qh, MINI-9pcr-5rq2-9x4g, MINI-9qj3-c5hm-r366, MINI-9qq2-vj7c-54jx, MINI-9qvr-grf7-c84q, MINI-9rpj-7574-cqj3, MINI-9vqj-pc9x-m8wv, MINI-9w37-pm75-hhx2, MINI-9w65-6976-588f, MINI-9wf7-33qh-h9fj, MINI-9wgr-7qj6-h4qp, MINI-9whc-8c7m-q9cr, MINI-9wm2-jhj9-r6rv, MINI-c2j2-xhmh-768g, MINI-c2mq-vh46-472w, MINI-c3p9-87r7-r682, MINI-c3v4-x4g3-g93v, MINI-c64j-qh23-9gfq, MINI-c6c8-87qr-87m7, MINI-c6rv-5fpc-34hf, MINI-c6wj-hq7w-8h2c, MINI-c6wp-w8pj-h8cc, MINI-c7w2-3prh-379m, MINI-c7xj-mq76-jc5h, MINI-c863-5535-4w64, MINI-c889-344g-q44w, MINI-c9w2-j275-4492, MINI-c9wc-4hm2-8mp2, MINI-cc36-w486-r23w, MINI-ccwf-r8r4-gjf3, MINI-cgjx-r8m9-rq7w, MINI-ch9f-x9vj-6j29, MINI-chf6-4hqc-gfwr, MINI-chw6-3m2m-f352, MINI-cp26-58wm-g522, MINI-cpvw-vwp3-4v8x, MINI-cq83-gfxv-hx2v, MINI-cq9f-pr7g-3ppv, MINI-cq9f-wqwf-4hrq, MINI-cqcv-w875-fmx9, MINI-cqh2-2pm5-j69x, MINI-cqh3-66qv-w9pr, MINI-cqjq-525q-2xrf, MINI-cv53-34wq-xc9h, MINI-cvh5-jwhf-w2pc, MINI-cvr4-8xc9-gg47, MINI-cvrw-9chq-6v54, MINI-cw3r-748m-43h9, MINI-cwcv-3mw3-gprc, MINI-cwh9-vjp2-45ph, MINI-cx4h-jw57-7rp4, MINI-cxh7-5vp3-ph2c, MINI-f2hr-32c6-x2vv, MINI-f2qg-372g-h4ch, MINI-f34q-x85r-xx3r, MINI-f365-5xgv-9prc, MINI-f37x-wmwm-57fh, MINI-f39q-75m7-j72g, MINI-f44x-rrmj-jq9c, MINI-f46v-fxx7-9r8w, MINI-f4q2-c8fv-rphc, MINI-f4rj-vv8h-8p82, MINI-f556-cxvg-xqrm, MINI-f57j-xpc3-mhr9, MINI-f57x-ppr2-q29w, MINI-f5jv-35qp-x652, MINI-f6fg-g7gc-cj2x, MINI-f6rm-4xc7-2qxm, MINI-f6rp-grwm-p652, MINI-f6xg-ph25-4hv4, MINI-f76p-226g-h988, MINI-f868-43ch-79wj, MINI-f93h-w2f4-q3cx, MINI-f9vm-2m56-vrgh, MINI-f9vw-w6p5-h472, MINI-fc9g-jrxq-qxfp, MINI-fcg6-rcc8-28v2, MINI-ffgv-wq75-382f, MINI-ffhv-88pw-pcvq, MINI-ffmx-2725-2r4h, MINI-ffph-ww2w-995q, MINI-ffx4-gv9q-vj8v, MINI-fg2c-rqwh-5f2h, MINI-fg87-8h56-p6p9, MINI-fh5c-m3gj-g27p, MINI-fh7m-pr3j-v988, MINI-fh9q-5rxr-vp4q, MINI-fhc3-93fv-5qj4, MINI-fj57-v223-x9mw, MINI-fm8h-px5f-38f5, MINI-fqm4-hx57-q62p, MINI-fqwf-fq5q-96f4, MINI-frh9-gv77-jw85, MINI-frjh-cw43-4x4r, MINI-frq6-5p34-m949, MINI-fv6r-fcgx-wr87, MINI-fvmm-j8xq-92gw, MINI-fvr3-w8m6-wxwx, MINI-fvvf-48v4-7gj6, MINI-fw63-fxh4-6mqc, MINI-fwvx-8r3h-v3ch, MINI-fx54-22m3-4723, MINI-fx5r-6f3q-j82c, MINI-fx8m-x748-8hhv, MINI-g23g-2mf9-2g3c, MINI-g264-3hx8-2467, MINI-g277-3m9h-c24g, MINI-g2r7-jfqv-g536, MINI-g337-8qfq-6c24, MINI-g3pw-v95x-3vrx, MINI-g3qp-225r-5w3r, MINI-g46h-65pc-gxp5, MINI-g4v9-7gmv-jr74, MINI-g5g7-2x8g-3vgr, MINI-g5j3-xj7v-6rcp, MINI-g5v6-7g97-c27h, MINI-g6cr-wv5v-776w, MINI-g6m5-qx2w-jxch, MINI-g748-29j2-23vm, MINI-g7mq-c75h-58x3, MINI-g7w2-qmq2-34cc, MINI-g847-cffq-78f7, MINI-g853-rm7g-9wpf, MINI-g86q-89gh-9q6g, MINI-g93p-8jg4-6537, MINI-g93r-hcm4-rph2, MINI-g9c3-9w2v-2hm4, MINI-g9f7-2r86-x7pr, MINI-g9g8-vcg6-56p9, MINI-g9w9-qvcv-3vmr, MINI-gcwr-67gp-mr63, MINI-gf5x-q6xf-65jm, MINI-gf7w-j87v-rcmc, MINI-gfjv-3q33-xm44, MINI-gfvj-wcg2-7rr4, MINI-ggg7-488p-99gx, MINI-ggg9-5rg7-m52w, MINI-gh32-jm8r-ccq2, MINI-gh63-j4r7-m538, MINI-gh8w-x8jp-xmv5, MINI-ghfm-7j96-mm22, MINI-ghhw-8g6c-m644, MINI-ghwc-9cqv-q8p8, MINI-ghxr-fmfj-v934, MINI-gj29-hm87-pgcf, MINI-gj42-x86j-9ffr, MINI-gm5r-ggc4-pc86, MINI-gmvv-rr7f-3g4h, MINI-gp36-cv87-4x45, MINI-gp4m-q2rc-c394, MINI-gpp5-2m2q-375r, MINI-gpwh-85j9-6j3m, MINI-gq6p-38vw-2wmg, MINI-gqfp-wp5m-f272, MINI-grw7-vvx2-6cx6, MINI-gv6h-v37x-vm6r, MINI-gv99-p9wc-55jm, MINI-gw35-7hfp-2px8, MINI-gw39-vp28-53p6, MINI-gw47-f27f-j276, MINI-gw7j-35hm-hxch, MINI-gw94-66pj-q34v, MINI-gwpx-34wc-mg4v, MINI-gx3r-j9hj-h84x, MINI-h24v-9jhc-2rc8, MINI-h2f2-gm2f-qp8c, MINI-h2gp-xcpv-fr2h, MINI-h2m9-cx7v-w5jr, MINI-h3ch-3f6f-6w2w, MINI-h3v2-ggc2-599f, MINI-h3wv-59w9-rhh3, MINI-h46f-96wx-c6mg, MINI-h5fm-rj27-rhxp, MINI-h654-jhcf-cf22, MINI-h679-r49j-vpf3, MINI-h72c-c4rg-2g56, MINI-h7cp-mw5r-c4v8, MINI-h7pj-jrxw-g7c2, MINI-h7vc-g3wf-2xmf, MINI-h8mf-g897-7wvc, MINI-h8p6-mj52-qmrw, MINI-h922-5qvw-f6m4, MINI-h959-7m3v-wx3m, MINI-h9ph-wr3g-mc58, MINI-h9wv-jm6p-5cv6, MINI-hcgj-r787-7qx7, MINI-hcrq-rv43-4hv9, MINI-hf3c-p3q4-3rgc, MINI-hfqx-mh5j-7p3m, MINI-hgjj-p2x6-fch2, MINI-hgvg-mm26-wjwr, MINI-hh48-rq3m-c6rg, MINI-hh68-pjv7-43qc, MINI-hhf3-v83m-46q2, MINI-hhj7-9x36-6mh3, MINI-hhp9-2q82-wv42, MINI-hj6q-p3r4-fvmv, MINI-hjh5-mc4q-3vvv, MINI-hjmj-465m-cwpq, MINI-hm4h-64g9-38w9, MINI-hm7m-3r2m-3cc2, MINI-hpgg-jpf3-5fm7, MINI-hpj8-q4pr-hg58, MINI-hpxf-48jw-7j9w, MINI-hq55-xrfj-7qhm, MINI-hqf8-v7x3-x34j, MINI-hrc5-w4qx-h48q, MINI-hrqm-cj4q-qm2m, MINI-hv59-6g3h-8qxh, MINI-hw8x-wfhf-4hrv, MINI-hww2-m9vf-fxg4, MINI-hx8g-chf8-xhj2, MINI-hxg8-qxr4-j55g, MINI-hxvv-mw7r-xfj5, MINI-j276-6755-p84q, MINI-j2fw-58gq-pp9m, MINI-j346-x6gg-h8qh, MINI-j38c-wqfq-mrpw, MINI-j43c-hghc-pp9x, MINI-j47f-56jc-hp7m, MINI-j4p2-6r4j-5vjj, MINI-j65j-h6pg-9qr2, MINI-j66m-3m3q-9wx4, MINI-j74g-jcwj-p56m, MINI-j754-f753-jq58, MINI-j755-3f2h-hhq3, MINI-j7qh-8wrm-96mr, MINI-j7vx-mprj-489j, MINI-j89c-mm9h-5jcr, MINI-j8qq-rc4c-6gq6, MINI-j94f-gg82-7p75, MINI-j9m7-h344-9452, MINI-jcm5-f28h-jv4r, MINI-jcq6-xqjf-g938, MINI-jfm4-6xvc-c922, MINI-jfw8-jvpg-2hr8, MINI-jg4v-5r9g-xf7v, MINI-jgrx-7wgj-hmpx, MINI-jgvh-jcqm-8pqc, MINI-jgw6-pvc2-pf64, MINI-jhch-5894-r577, MINI-jhj5-whqp-8h6c, MINI-jjwx-f4gc-h8rp, MINI-jm7g-j72p-mwwh, MINI-jm82-8frc-vgwj, MINI-jmgf-5g65-2jxw, MINI-jmvh-6293-j697, MINI-jmw3-23w4-2pvc, MINI-jmxf-w558-f8f5, MINI-jp4p-p35p-m8mh, MINI-jp59-r8w4-pfqq, MINI-jpqp-8w73-xrw3, MINI-jpw9-mww8-38g5, MINI-jpxw-hr7q-6rp9, MINI-jq7m-h25j-xv34, MINI-jq7p-5pmv-g73g, MINI-jqqr-6j4f-fvm6, MINI-jr36-gwhf-vxx7, MINI-jr82-qc4m-gvwp, MINI-jv5m-j646-j35x, MINI-jv8r-hpwx-xf6w, MINI-jvgv-6wq9-wp2v, MINI-jvq5-m33r-5hc8, MINI-jvqw-p535-r28f, MINI-jvr4-62v7-v6gr, MINI-jw25-h85j-g4vj, MINI-jwch-q3vv-jxcf, MINI-jwrw-mg59-h6w8, MINI-jwvf-vj5w-696r, MINI-jwxp-4wj5-3g7q, MINI-jx5r-mrh9-x78g, MINI-jxgx-c6f3-6mxg, MINI-m22h-59pr-5v3j, MINI-m2m6-r87j-9rh9, MINI-m2wg-jh6c-f2g3, MINI-m395-fp46-wg6g, MINI-m3q2-242r-qc68, MINI-m42c-6hjf-qrg2, MINI-m4w6-r33j-22gq, MINI-m79m-49m3-rjmw, MINI-m7mm-jvvv-vvw9, MINI-m7x8-7j3p-668f, MINI-m929-gcrh-q7w6, MINI-m92j-6pqv-v347, MINI-m94j-297v-6g6q, MINI-m9mv-c78m-jrc8, MINI-m9p2-87qq-cw8w, MINI-mccr-jrgw-xw24, MINI-mcq4-q4rw-6v47, MINI-mf53-6gr2-gjgr, MINI-mg5h-pj9x-m77c, MINI-mh74-q3cg-54r3, MINI-mh8m-f734-24rf, MINI-mh8q-3fgx-rh2f, MINI-mh9v-8xh5-2f6j, MINI-mhfv-hgfr-8rw2, MINI-mj9v-2f47-6fmj, MINI-mmh6-qjj6-qjmv, MINI-mmj7-x2r5-fmg6, MINI-mp3q-cw3p-gq42, MINI-mp9p-x5qf-5r95, MINI-mqqp-p5vf-v95j, MINI-mqr6-hgxc-c8gh, MINI-mv97-59x5-xp9r, MINI-mw86-vvw6-m4q8, MINI-mwcj-q654-g2cf, MINI-mwrm-xqwv-p5pw, MINI-mx7f-wwc3-vp6j, MINI-p2hp-52pm-mr62, MINI-p2jg-8hxc-x4m6, MINI-p2qg-jc55-f223, MINI-p352-6995-7v8p, MINI-p356-22x3-cq2v, MINI-p3xw-8qgv-cp32, MINI-p459-f3v4-3cwc, MINI-p4cp-m93r-m6fc, MINI-p4m5-3wmr-x2gg, MINI-p5rp-8whc-244f, MINI-p6q7-456q-32pr, MINI-p6xw-xcjc-664x, MINI-p7w3-9755-vcwj, MINI-p89j-g6r6-hxr8, MINI-p92h-9gfx-jxh6, MINI-p934-33qf-23fv, MINI-p97v-q7h4-mfw9, MINI-pcf9-7jxf-j9rw, MINI-pcmr-49rh-pqj8, MINI-pcqh-4v27-26m4, MINI-pf85-qfq5-w56r, MINI-pf8x-wrw9-838m, MINI-pfg4-8v7h-vp6g, MINI-pgj2-jhf6-pj4h, MINI-ph6c-w2p4-rfh2, MINI-pj6x-rm5h-2gmf, MINI-pjj9-7xg5-wqmr, MINI-pjjg-fhhc-hpj4, MINI-pm6m-jpvx-9h22, MINI-pq54-pgf2-h356, MINI-pqgm-48pw-xjjw, MINI-pqmq-58xg-4rcg, MINI-prq4-743c-79fc, MINI-prr6-fm9h-cg88, MINI-pv8p-7j7q-5x88, MINI-pw63-6v6h-qjhp, MINI-pwr2-7hrq-vj8r, MINI-pwv4-hvvr-p868, MINI-px55-r3w7-jq97, MINI-pxcj-86r4-c6cj, MINI-pxf4-ch6c-2pjh, MINI-q272-98fw-c983, MINI-q2g5-r344-24hq, MINI-q2m8-2vrg-97rj, MINI-q2p5-7pqx-v9q4, MINI-q35h-v2cf-xm6v, MINI-q38c-9h5v-r48p, MINI-q3qq-ph3c-8q94, MINI-q3wf-m77j-vj3w, MINI-q4qg-6q56-p9g9, MINI-q5fm-g7f7-5h86, MINI-q64m-xvrm-rphm, MINI-q6m8-2jh5-f526, MINI-q7p3-6982-chv8, MINI-q8gx-9qr4-4jv2, MINI-q8hq-mv6x-57pv, MINI-q8x6-g5gg-7xpc, MINI-q9h2-m72f-h4mw, MINI-qc4r-rmj7-jx99, MINI-qchj-hj87-8r6q, MINI-qcj2-x2p5-6qcp, MINI-qcr9-pc6q-m3jj, MINI-qf82-g9qc-q85h, MINI-qffr-qh24-h665, MINI-qg42-62cr-24v3, MINI-qg65-4672-rxcj, MINI-qg83-xwf6-wp6w, MINI-qgjf-3566-ggqp, MINI-qjvx-qjj5-h58v, MINI-qmc8-m242-3827, MINI-qp6v-96wg-6c3q, MINI-qp88-gwx8-jhh3, MINI-qq87-xh9j-vq4g, MINI-qr66-8wmg-h3hg, MINI-qrg9-7r69-4p3c, MINI-qrjp-cxgx-qhx3, MINI-qv94-8xq7-fv23, MINI-qvjx-9rpr-45xf, MINI-qvqr-3f3f-jgf4, MINI-qvwj-53xg-r8qc, MINI-qwfc-g3gw-xw4f, MINI-qwh2-74j6-q96c, MINI-qwjf-qg3m-vpqx, MINI-qwr8-fwhm-9vqh, MINI-r2c3-5h75-4rvc, MINI-r33g-5f76-cx4c, MINI-r34f-h4hr-p6cq, MINI-r3f6-66cm-fggw, MINI-r3hf-q6qc-q5rw, MINI-r55h-v622-jv39, MINI-r5f5-r5xr-r53q, MINI-r5p6-jccj-42jr, MINI-r5w4-cwg3-68jv, MINI-r685-crhm-hrwf, MINI-r6mm-7g2v-2xrj, MINI-r6w2-7prh-rjm9, MINI-r7hh-pxm5-4375, MINI-r7r8-wcwj-gh84, MINI-r86j-f285-mp74, MINI-r96h-rq34-wvff, MINI-r9mp-vx33-6rmr, MINI-rc2j-vjpv-3f29, MINI-rc7g-x439-pfj3, MINI-rc7v-hr4q-f5w7, MINI-rcgh-4x3m-f32p, MINI-rcq7-4hvh-6h7r, MINI-rcqf-x8vx-qpv9, MINI-rf3f-x63w-p76w, MINI-rfg3-92mc-6cwh, MINI-rgwp-rmm3-mfcj, MINI-rh95-26j9-9j9c, MINI-rhh9-5335-76g8, MINI-rhp5-p66c-39q4, MINI-rhwf-p2fv-vr88, MINI-rjv5-m8fg-xhw4, MINI-rjxp-q2qw-qpwm, MINI-rm84-8vfm-p7mg, MINI-rp8f-2x8g-6rc4, MINI-rq58-78xw-8x87, MINI-rqv9-m682-f9rv, MINI-rr44-4q4j-45h7, MINI-rr72-fvm3-5qw3, MINI-rrfc-hv9f-m5jg, MINI-rrpf-36h4-j22h, MINI-rrpv-w29c-mgp6, MINI-rrvc-7529-hf29, MINI-rrwg-8mrc-jvc8, MINI-rrxq-h6v5-w3mr, MINI-rwf6-wccp-wm95, MINI-rwgw-6mff-2cmx, MINI-rxhh-vfh7-x7jv, MINI-rxwf-qqhp-4fc4, MINI-v2c6-m49m-5hr8, MINI-v2gv-g9mv-x4mc, MINI-v2j6-rgj9-mvp3, MINI-v3qh-wgqr-h3hx, MINI-v44j-w344-298g, MINI-v56f-6pmh-876w, MINI-v58p-wg9r-q6jf, MINI-v5rq-98hr-m5r2, MINI-v68p-fxm7-wcg3, MINI-v6r7-jv28-pc4x, MINI-v7pp-j9h7-w9r7, MINI-v7qc-hmr6-rfv5, MINI-v87c-wcv7-hw2f, MINI-v8m9-vxvc-55v7, MINI-v955-4q2j-c4v6, MINI-v95w-vh7j-pv86, MINI-vf26-prv5-46x8, MINI-vfxx-22rv-m4gc, MINI-vg7h-f49v-hcpx, MINI-vghp-mmf8-vrx6, MINI-vgqf-xhhm-r567, MINI-vh6j-p562-qx9g, MINI-vj9v-x244-5rw4, MINI-vjfx-f84h-6929, MINI-vjq3-j9w6-5wcq, MINI-vm96-82q6-w3mg, MINI-vmc2-5r66-mf96, MINI-vmhc-cq57-xg92, MINI-vmmg-jqgq-33wp, MINI-vmwg-r2gr-9mgg, MINI-vp37-v5gw-fr36, MINI-vpcr-9mr7-qfc4, MINI-vpp8-qpc4-23g8, MINI-vqmv-f44m-23xc, MINI-vqr4-8q7v-x6j5, MINI-vr83-5mc8-36pj, MINI-vr9h-667r-27rv, MINI-vr9r-262w-pm68, MINI-vrmw-jf5h-pm24, MINI-vrr7-9wc8-2xw3, MINI-vv6h-rc56-mxgv, MINI-vv8r-jxxp-596c, MINI-vvhr-w66q-vrx7, MINI-vwjv-vmmw-qr93, MINI-vwqh-fw9f-8f86, MINI-vxr8-9rh2-ph56, MINI-vxw9-6v68-j9hf, MINI-vxwj-9qq3-ccjw, MINI-w295-c5c2-9p45, MINI-w2jp-6wmc-hjwq, MINI-w2pj-5h2r-xp3p, MINI-w37f-jfhm-33r7, MINI-w43q-pphg-85jc, MINI-w4v5-57cr-c5jm, MINI-w4xm-wmf4-r6wj, MINI-w5q3-xrwx-h9rw, MINI-w656-qm6c-67x8, MINI-w696-3p2p-hv28, MINI-w6wm-wfhv-phwq, MINI-w73g-hgc9-3gx3, MINI-w757-4h54-pw6r, MINI-w8h7-h6g2-7w48, MINI-w8q6-cmrr-f2v4, MINI-w8v5-mx29-4qxq, MINI-w8x5-h76c-79cr, MINI-w95q-3pp3-qc3j, MINI-w9f7-987h-cv2r, MINI-w9j7-7fc4-gg43, MINI-w9qc-gp78-9cmr, MINI-wc4r-hmgh-2m89, MINI-wc97-hqwc-22cx, MINI-wcwh-86qm-fv3q, MINI-wf5h-fwqv-j64q, MINI-wfcj-h479-r3w3, MINI-wgwr-76qg-j43x, MINI-wh5v-gc9v-w43p, MINI-wj4r-w273-hffj, MINI-wj5r-pgx3-w4wc, MINI-wpgm-jfj8-hr6x, MINI-wq2w-335m-j72v, MINI-wq6h-x69v-8qw3, MINI-wq6m-8pvg-jgvc, MINI-wqfh-pmrh-2j4m, MINI-wr2h-8q28-g7fj, MINI-wrx8-v3fh-rr5c, MINI-ww88-8pcq-32vv, MINI-wx25-92m8-m8j4, MINI-wxmf-hvc2-322h, MINI-x296-534q-6hc4, MINI-x2h9-762x-j99g, MINI-x32v-8mq3-7x9g, MINI-x3hc-388w-fjm8, MINI-x3qm-p44p-r8qc, MINI-x47w-7v3m-cv7m, MINI-x4p2-9g5g-3qj5, MINI-x4rp-7mjc-7c34, MINI-x593-vpw8-3f2c, MINI-x5c5-36wr-4w38, MINI-x6cw-6q2q-w5w2, MINI-x6f6-2mhh-8fvh, MINI-x6mv-p4m5-rpfp, MINI-x6rg-4w6c-59h5, MINI-x75m-5mh4-w382, MINI-x7cq-v6mx-v4g5, MINI-x7xg-ghh5-76r8, MINI-x86j-mpw9-f4v9, MINI-x8m6-967c-9v6f, MINI-x9hg-mhwh-j6g7, MINI-xc7j-m9q2-c5x9, MINI-xc92-g8g4-2hww, MINI-xf4f-j8pq-4vqc, MINI-xff9-pq27-p4r7, MINI-xfm8-fv2p-gghx, MINI-xfx9-hm6r-vj52, MINI-xgc7-3hx5-4m8h, MINI-xh3v-f393-rjgx, MINI-xhc3-crq8-rh34, MINI-xhjr-5m9f-wj7r, MINI-xm36-mv8f-4wj6, MINI-xmw8-494h-rcmr, MINI-xmwj-w765-g8p7, MINI-xmxq-mcvq-w3w5, MINI-xpfx-f6mq-mw8p, MINI-xprh-mc7j-29fr, MINI-xq7f-g2c6-95hc, MINI-xq93-3qh6-2h3v, MINI-xqgv-qjjq-gv86, MINI-xqr8-p4mv-xvqp, MINI-xqr9-jq79-qh5v, MINI-xqw5-xmqf-jj77, MINI-xr28-r35v-mg23, MINI-xr2x-p564-fq6p, MINI-xrcj-3q7m-xrjm, MINI-xrjx-gfrh-x2v3, MINI-xrr4-49hr-pv97, MINI-xv9w-fgxh-5m4q, MINI-xvc5-668v-24vq, MINI-xwmh-pv9j-g57p, MINI-xx5j-c6m2-xjr4, MINI-xxm5-f69m-xxp2, RHSA-2026:54413, RHSA-2026:54419, RHSA-2026:68256, RHSA-2026:70684, RHSA-2026:70726, ROOT-APP-GOBINARY-CVE-2026-63209, SUSE-SU-2026:24131-1, SUSE-SU-2026:24153-1, SUSE-SU-2026:24222-1, SUSE-SU-2026:24261-1, SUSE-SU-2026:24277-1, SUSE-SU-2026:4554-1, SUSE-SU-2026:4661-1, SUSE-SU-2026:4662-1, UBUNTU-CVE-2026-63209, openSUSE-SU-2026:11939-1, openSUSE-SU-2026:11953-1, openSUSE-SU-2026:11955-1, openSUSE-SU-2026:11957-1, openSUSE-SU-2026:11960-1, openSUSE-SU-2026:11961-1, openSUSE-SU-2026:11962-1, openSUSE-SU-2026:11964-1, openSUSE-SU-2026:22039-1, openSUSE-SU-2026:22078-1, openSUSE-SU-2026:22117-1, openSUSE-SU-2026:22140-1 ## What is CVE-2026-63209? CVE-2026-63209 is a high-severity vulnerability in klauspost compress, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim. ### Official description compress provides various compression algorithms. Prior to version 1.18.7, a signed integer overflow vulnerability in s2.NewDict() allows an attacker to bypass repeat index validation by supplying a dictionary with a uvarint-encoded repeat value exceeding MaxInt64. When Dict.Encode() is subsequently called, the overflowed negative repeat value causes an out-of-bounds memory access via unsafe.Pointer arithmetic, crashing the process with SIGSEGV. This issue has been patched in version 1.18.7. Weakness: CWE-787 (Out-of-bounds Write), CWE-190 (Integer Overflow or Wraparound) ## Which versions are affected by CVE-2026-63209? 3 open source packages ship an affected version, including github.com/klauspost/compress. | Package | Ecosystem | Affected | Fixed in | | --- | --- | --- | --- | | `github.com/klauspost/compress` | Go | All versions | 1.18.7 | | `github.com/klauspost/compress` | Go | All versions | 1.18.7 | | `github.com/klauspost/compress` | Go | From 1.16.0 | 1.18.7 | | `k6v1` | Red Hat:hummingbird:1 | All versions | 0:1.8.1-0.1.hum1 | | `nats-server2.12` | Red Hat:hummingbird:1 | All versions | 0:2.12.15-0.1.hum1 | | `nats-server2.14` | Red Hat:hummingbird:1 | All versions | 0:2.14.7-0.1.hum1 | | `podman` | Red Hat:hummingbird:1 | All versions | 0:6.1.2-1.hum1 | | `podman-docker` | Red Hat:hummingbird:1 | All versions | 0:6.1.2-1.hum1 | | `podman-machine` | Red Hat:hummingbird:1 | All versions | 0:6.1.2-1.hum1 | | `podman-remote` | Red Hat:hummingbird:1 | All versions | 0:6.1.2-1.hum1 | | `podmansh` | Red Hat:hummingbird:1 | All versions | 0:6.1.2-1.hum1 | | `skopeo` | Red Hat:hummingbird:1 | All versions | 0:1.24.1-1.hum1 | | `skopeo-tests` | Red Hat:hummingbird:1 | All versions | 0:1.24.1-1.hum1 | | `google-osconfig-agent` | SUSE:Linux Enterprise Micro 5.5 | All versions | 20260928.01-150000.1.70.1 | | `google-osconfig-agent` | SUSE:Linux Enterprise Module for Public Cloud 12 | All versions | 20260928.01-1.63.1 | | `amazon-cloudwatch-agent` | SUSE:Linux Enterprise Module for Public Cloud 15 SP4 | All versions | 1.300073.0-150400.9.18.1 | | `google-osconfig-agent` | SUSE:Linux Enterprise Module for Public Cloud 15 SP4 | All versions | 20260928.01-150000.1.70.1 | | `amazon-cloudwatch-agent` | SUSE:Linux Enterprise Module for Public Cloud 15 SP5 | All versions | 1.300073.0-150400.9.18.1 | | `google-osconfig-agent` | SUSE:Linux Enterprise Module for Public Cloud 15 SP5 | All versions | 20260928.01-150000.1.70.1 | | `amazon-cloudwatch-agent` | SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | All versions | 1.300073.0-150400.9.18.1 | | `google-osconfig-agent` | SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | All versions | 20260928.01-150000.1.70.1 | | `amazon-cloudwatch-agent` | SUSE:Linux Enterprise Module for Public Cloud 15 SP7 | All versions | 1.300073.0-150400.9.18.1 | | `google-osconfig-agent` | SUSE:Linux Enterprise Module for Public Cloud 15 SP7 | All versions | 20260928.01-150000.1.70.1 | | `aliyun-cli` | SUSE:Linux Enterprise Server 16.0 | All versions | 3.5.1-160000.1.1 | | `distribution` | SUSE:Linux Enterprise Server 16.0 | All versions | 3.1.1-160000.5.1 | | `google-osconfig-agent` | SUSE:Linux Enterprise Server 16.0 | All versions | 20260928.01-160000.1.1 | | `aliyun-cli` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 3.5.1-160000.1.1 | | `distribution` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 3.1.1-160000.5.1 | | `google-osconfig-agent` | SUSE:Linux Enterprise Server for SAP applications 16.0 | All versions | 20260928.01-160000.1.1 | | `google-osconfig-agent` | SUSE:Linux Micro 6.0 | All versions | 20260928.01-159998.1.1 | | `google-osconfig-agent` | SUSE:Linux Micro 6.1 | All versions | 20260928.01-slfo.1.1_1.1 | | `aliyun-cli` | openSUSE:Leap 16.0 | All versions | 3.5.1-160000.1.1 | | `cadvisor` | openSUSE:Leap 16.0 | All versions | 0.60.6-bp160.1.1 | | `distribution` | openSUSE:Leap 16.0 | All versions | 3.1.1-160000.5.1 | | `google-osconfig-agent` | openSUSE:Leap 16.0 | All versions | 20260928.01-160000.1.1 | | `aliyun-cli` | openSUSE:Tumbleweed | All versions | 3.5.1-2.1 | | `amazon-cloudwatch-agent` | openSUSE:Tumbleweed | All versions | 1.300073.0-1.1 | | `cadvisor` | openSUSE:Tumbleweed | All versions | 0.60.6-1.1 | | `distribution` | openSUSE:Tumbleweed | All versions | 3.1.1-9.1 | | `go-containerregistry` | openSUSE:Tumbleweed | All versions | 0.22.1-2.1 | ## How do I fix CVE-2026-63209? Upgrade github.com/klauspost/compress to 1.18.7 or later. ## Is CVE-2026-63209 being exploited? There is no known exploitation of CVE-2026-63209 in the wild and no public exploit code. ## Fix prompt for AI coding agents ```text Check this codebase for CVE-2026-63209 and fix it if it is affected. What it is: CVE-2026-63209 is a high-severity vulnerability in klauspost compress, published on 29 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim. Exploitation: There is no known exploitation of CVE-2026-63209 in the wild and no public exploit code. Affected packages and fixed versions: - github.com/klauspost/compress (Go): affected all versions; fixed in 1.18.7 - github.com/klauspost/compress (Go): affected all versions; fixed in 1.18.7 - github.com/klauspost/compress (Go): affected from 1.16.0; fixed in 1.18.7 Task: 1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies. 2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it. 3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead. 4. Run the tests and summarise what changed and why. 5. If nothing in the project is affected, say so and change nothing. Reference: https://insights.sbomify.com/CVE-2026-63209/ (Markdown: https://insights.sbomify.com/CVE-2026-63209/index.md) ``` ## Sources - CVE record: https://www.cve.org/CVERecord?id=CVE-2026-63209 - NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-63209 - OSV: https://osv.dev/vulnerability/CVE-2026-63209 --- From sbomify Insights: https://insights.sbomify.com/CVE-2026-63209/ Summaries are generated and may contain mistakes; the official description above is the record.