# CVE-2026-39827: Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh

> An authenticated SSH client can crash the server by repeatedly opening rejected channels, causing unbounded memory growth and service disruption.

- **Severity:** Medium 6.5 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 22 May 2026
- **Updated:** 22 May 2026
- **Also known as:** AZL-87170, AZL-87260, AZL-87293, AZL-87411, AZL-87474, AZL-87636, AZL-87720, AZL-87765, AZL-87930, AZL-87978, AZL-88080, AZL-88185, AZL-88320, BELL-CVE-2026-39827, CLEANSTART-2026-CX44155, CLEANSTART-2026-DE50350, CLEANSTART-2026-DL51809, CLEANSTART-2026-FI87421, CLEANSTART-2026-PN24745, CLEANSTART-2026-SJ24518, CLEANSTART-2026-TF22707, CLEANSTART-2026-TJ72620, CLEANSTART-2026-UF72074, CLEANSTART-2026-YZ71204, CLEANSTART-2026-ZC63840, CLEANSTART-2026-ZJ64953, DEBIAN-CVE-2026-39827, ECHO-7626-c57c-efc9, GHSA-qpw4-5x99-6vjp, GO-2026-5016, MINI-224g-v362-x478, MINI-22p2-mm66-3mjq, MINI-23r6-gcfm-c3cc, MINI-23v4-8m2j-w4gh, MINI-23wj-gwww-fwg3, MINI-2453-q325-c3w3, MINI-2464-qxjq-hmx7, MINI-24m5-m74x-mq28, MINI-2545-99hj-h54q, MINI-256f-5r9x-3886, MINI-258c-753q-297g, MINI-2699-cj57-6fhm, MINI-26j3-rxm2-88q6, MINI-26v3-8r4r-gp8r, MINI-26v6-c79v-r4q3, MINI-27vq-m7c6-xjpp, MINI-27xv-h9x5-cvxp, MINI-282g-x443-w9q3, MINI-28v8-6mj7-x937, MINI-292q-w76w-757w, MINI-2936-4cg9-3jjp, MINI-295v-m3w3-hvw7, MINI-296f-572f-c233, MINI-298p-wgmf-fjh5, MINI-2c44-pwq8-2gqj, MINI-2c7h-8gvw-j83j, MINI-2cc2-mmhc-pj6r, MINI-2cjj-89xr-vm6m, MINI-2g2q-7299-hfcg, MINI-2g38-pf9v-vr98, MINI-2g4h-m7c2-573r, MINI-2ghh-p35x-c4x2, MINI-2gm5-9hjg-c656, MINI-2gv6-xmgm-mgfx, MINI-2gvc-gccg-gmrv, MINI-2h4m-rphm-gvj3, MINI-2j3r-r2f4-vr8p, MINI-2j6r-pjmr-vjc2, MINI-2jc2-g4x7-cr3f, MINI-2jf3-m9v6-hgcp, MINI-2jqc-pwg2-f6qq, MINI-2m5h-g6gg-r538, MINI-2mmv-3g82-6p7j, MINI-2p53-f9q4-p6gj, MINI-2pf4-hqh2-q77f, MINI-2pfj-7vqf-hgrg, MINI-2q63-cfvp-34f3, MINI-2qfh-7rvr-wr54, MINI-2r27-vqpm-q6fg, MINI-2rpc-x593-wv77, MINI-2v88-j228-837p, MINI-2vch-xq2h-6gpm, MINI-2vpc-w8vf-fvq9, MINI-2vqr-gxhr-mf39, MINI-2vvq-f884-6q98, MINI-2whp-crpj-w8xv, MINI-2wvr-vq8r-2fhx, MINI-2x48-h9vj-cmq9, MINI-2x5g-x75m-p425, MINI-2x6r-v3xp-x82f, MINI-2xhg-qhg9-phw8, MINI-2xvr-2xx5-rvh3, MINI-2xxc-666g-3vqf, MINI-334w-8877-wg65, MINI-33cx-jcg5-p286, MINI-33hr-wwcv-rqx2, MINI-33j9-g763-2h6x, MINI-33xj-5vww-4h45, MINI-349v-p6f7-2rh9, MINI-34ww-pcjw-jqj2, MINI-35j5-pw4h-fxj7, MINI-374c-5fwc-fcgw, MINI-37p5-9r96-7mwr, MINI-37r2-xpm5-fmxv, MINI-383m-v5x8-89x9, MINI-387p-rrqf-4ghf, MINI-38fr-27jj-g983, MINI-38q5-wxgp-q2vf, MINI-38vm-j22m-5xr3, MINI-38w4-x87w-6vg8, MINI-3968-qvjf-qg77, MINI-398f-x5xx-wjm2, MINI-39gq-56fq-rmph, MINI-39pw-9p7w-pj8g, MINI-39px-j4j5-rfvp, MINI-39r2-q5fr-cq7r, MINI-39xw-65m9-6q37, MINI-3c4h-2q5f-9v23, MINI-3cr5-xrxf-pvc4, MINI-3cw4-5623-c7c4, MINI-3cwg-vq92-gp93, MINI-3fmw-r6g8-v2vc, MINI-3fxf-r7h9-r47x, MINI-3g3r-523x-wcx7, MINI-3g4m-v5cm-442m, MINI-3gg6-xh96-3j2m, MINI-3h7j-4fcp-mhm4, MINI-3hcr-x85j-93wj, MINI-3hfg-c863-q3x6, MINI-3hx7-9j8j-4m4r, MINI-3j8x-96mg-3879, MINI-3mcp-74h5-4mxf, MINI-3mm5-x4v9-2m83, MINI-3pgw-7xfm-x5hw, MINI-3q67-37m2-4x96, MINI-3qfr-vg2w-gv6f, MINI-3qm4-cfp4-5vg4, MINI-3qp7-7h7w-c3wr, MINI-3qv8-hfvm-gv22, MINI-3r5p-x3c2-pjm5, MINI-3v55-9p69-5mxr, MINI-3v67-9mq8-6hp6, MINI-3v7f-3w55-qc9r, MINI-3vmv-fcjv-xgcx, MINI-3w4q-v59g-mvp8, MINI-3wc9-v3w6-rjfm, MINI-3wp3-x8gp-j3wv, MINI-3x57-q3p4-98pq, MINI-3xj4-h6j5-hfjr, MINI-3xxf-vxgg-g7xv, MINI-424c-8hqc-45gx, MINI-426j-72vh-c2g2, MINI-42g2-wf67-4vf2, MINI-42xq-vc3f-rr3g, MINI-43f7-7w7m-qfmp, MINI-43hm-mc57-g3wm, MINI-43jf-r65j-cp58, MINI-44h4-hhgp-7345, MINI-44hx-4f3r-xxq8, MINI-44p3-wwgv-xvq4, MINI-4582-m5w7-94jh, MINI-4588-8pxw-hv7j, MINI-468x-gp6h-88hr, MINI-46px-4g74-mc87, MINI-46qj-8vwm-7j9h, MINI-46vr-5m66-3pw5, MINI-476g-xc99-vqf9, MINI-47v9-r4gp-6rxh, MINI-4995-cjwf-rgmg, MINI-49mm-6chg-v8m6, MINI-49q5-cj3w-2h6x, MINI-4c3h-ph2x-mg4m, MINI-4chj-mh5w-gx98, MINI-4crh-5r53-73g6, MINI-4f77-97cc-g8gh, MINI-4f97-93fc-339p, MINI-4fg4-554v-6whw, MINI-4g7j-2rgf-xp96, MINI-4gh7-c63r-qm68, MINI-4gj8-7vqv-vcf6, MINI-4gqm-r786-4mcv, MINI-4j8f-5ggg-fh5r, MINI-4jmq-f8pp-j9cj, MINI-4jw7-87q2-5xh9, MINI-4mgw-jhqh-9fvq, MINI-4mhc-6qcf-fp35, MINI-4p74-7rcx-rjx2, MINI-4q54-39f3-cj49, MINI-4qqv-pv9m-xgcw, MINI-4rcw-c7r9-6286, MINI-4rr9-x6rp-wgcf, MINI-4v2m-v563-wqqf, MINI-4v8w-w46q-w8j6, MINI-4vgf-w668-x898, MINI-4vmc-39x2-c6q9, MINI-4vmv-jv9j-65vr, MINI-4wrc-mv46-x6qm, MINI-4x75-3pr6-2vw3, MINI-4xf4-3xvx-mx23, MINI-52c6-h394-r477, MINI-53pp-mc7q-jm9q, MINI-53vg-2qh4-mp22, MINI-5435-rr79-fjcf, MINI-54fv-wr75-7344, MINI-54h6-5rpm-fmx8, MINI-54r7-h4fm-8rwv, MINI-54wp-9fh5-jq9q, MINI-55pw-4fh5-f67c, MINI-55rq-8c3r-5vf2, MINI-564c-mjg4-9575, MINI-568g-r6gf-6m34, MINI-57jv-4p4j-cghr, MINI-58f9-vjpw-hpmg, MINI-59p6-h96f-mv8j, MINI-5c96-xww9-m9jr, MINI-5ccf-8mj2-6j82, MINI-5cfj-jwq4-42x2, MINI-5cjr-6p6h-3p23, MINI-5cxp-9hq7-p4h7, MINI-5f33-9fpq-3m88, MINI-5f7g-wjgp-fg7w, MINI-5f9p-wgxj-6vv5, MINI-5ffx-fcmq-mjrc, MINI-5fxv-vj8g-45vj, MINI-5g85-r4ff-7734, MINI-5ggj-qjp2-frf6, MINI-5gpg-x36p-r3cv, MINI-5h23-rj35-r74q, MINI-5h5w-x8xr-5rqr, MINI-5h9c-xrjw-gcv8, MINI-5hv3-mqh9-c6h5, MINI-5j4g-x26r-xqvh, MINI-5j9f-p98p-5qh2, MINI-5jcj-6cp9-477x, MINI-5mpr-frr2-f3fm, MINI-5mrw-c564-m6cf, MINI-5p47-fv2g-2fc3, MINI-5p5c-635x-g528, MINI-5p5q-5m2x-wrv6, MINI-5pf4-ggvm-rh8r, MINI-5pf6-vq2g-p2fx, MINI-5pjw-8jjm-68hf, MINI-5q3r-6x8q-vvhp, MINI-5q84-4qcg-467g, MINI-5qhm-jhv7-gj3h, MINI-5qq3-hcrj-fhrc, MINI-5r8q-4j39-6gqr, MINI-5r94-r25v-wqh2, MINI-5rhm-6h9j-r5gj, MINI-5v9j-3q8c-wqqc, MINI-5w95-w3g4-hrhg, MINI-5wh9-4qvv-qmg9, MINI-5x8c-g28p-wg2c, MINI-5xqh-56wv-whpp, MINI-6228-3gh9-x5qx, MINI-629j-624g-4mwx, MINI-62g9-j4g9-wfc8, MINI-64vw-8hw7-x7p8, MINI-654w-6qmc-g2wc, MINI-6599-6jr8-q97j, MINI-668c-pm2f-48h2, MINI-66j9-cqxx-mrwp, MINI-6768-3wvr-wrhv, MINI-676v-qwm7-jwrh, MINI-677r-4xmq-4vrx, MINI-682p-2943-xc82, MINI-6833-8hpf-w3p5, MINI-68hv-gh7r-xp8w, MINI-69mv-hrqg-wrq5, MINI-6c2w-984m-qj69, MINI-6c9r-p635-j9hj, MINI-6ccj-952f-x8g3, MINI-6cvj-q28f-mq25, MINI-6g2c-292w-cfr2, MINI-6g9h-8frx-r427, MINI-6gxw-97w9-8v3j, MINI-6h6x-46mg-cfqr, MINI-6h9w-xrm2-r28c, MINI-6hgh-369p-79qj, MINI-6j23-3hx8-m7m5, MINI-6jvc-59p3-rfjp, MINI-6m44-cc9r-w9hg, MINI-6m8r-5fh9-fgf8, MINI-6mf9-426w-m2xw, MINI-6p62-xh9v-76r8, MINI-6px4-mj52-8rg3, MINI-6qfh-5gp9-rqv9, MINI-6qvr-hrv9-3ffg, MINI-6qw3-8m3w-rm77, MINI-6r4f-6wqr-g96h, MINI-6rcj-2hcv-hhm9, MINI-6rj2-x8r5-mvrp, MINI-6rwf-3fjh-74g3, MINI-6v5q-7qg2-7g2m, MINI-6w2p-mhh2-76pf, MINI-6wr4-5p2f-2x9g, MINI-6wxw-98r8-jrw9, MINI-6xjx-g7xq-v8qq, MINI-728v-26gg-v7cf, MINI-72mp-w75j-q924, MINI-7343-72v8-pr2j, MINI-73jv-m9xc-c74r, MINI-73m9-3h8v-f2mh, MINI-73x6-9h4x-48c7, MINI-747q-m856-4w7x, MINI-74qm-8gf8-mc74, MINI-75wm-rmvw-2g4v, MINI-7667-c447-ch4f, MINI-76q3-7w3h-xhvv, MINI-773c-v86j-2ccp, MINI-785w-gv8v-qgwc, MINI-78f3-pwfw-3jh9, MINI-78fg-2mw5-336f, MINI-78hj-28j3-7mxp, MINI-79h6-p23c-fjmj, MINI-7cvw-jm57-695m, MINI-7f6v-wqfr-xhcm, MINI-7fcq-5fjr-mq2f, MINI-7ff9-rqjm-4gxr, MINI-7fgp-r4mp-xhc7, MINI-7g97-v62f-qf3r, MINI-7gch-vc44-95ph, MINI-7gj6-mj98-59c7, MINI-7h4v-w495-mfm9, MINI-7hf3-vfcx-mhg4, MINI-7hfm-96x2-789v, MINI-7hmx-8hgq-7c9j, MINI-7hqr-wmq5-ch5m, MINI-7hr2-5mcp-4pmv, MINI-7hrj-v5x6-42m2, MINI-7j64-ffj4-m5fj, MINI-7jgg-j62m-r66r, MINI-7m4q-wqg7-4mjj, MINI-7m7f-8mc9-cg65, MINI-7m9r-6vr5-84m7, MINI-7mhr-q5cc-gr72, MINI-7mmq-3xxr-gvcv, MINI-7mp3-429q-5prf, MINI-7mw3-97v2-hwvh, MINI-7mwf-rj95-m3cf, MINI-7pf5-g43r-2w25, MINI-7q96-fr7w-4c9r, MINI-7rw9-q2qx-76v7, MINI-7vmh-cf6h-x757, MINI-7vp5-22wc-chmc, MINI-7x8q-qcw6-vrxf, MINI-7xgp-c96j-xrwf, MINI-7xhg-5f69-99hr, MINI-7xp7-fm6r-3m7j, MINI-7xw3-3rwc-hv9m, MINI-7xxm-jx7m-hxrm, MINI-824g-h4xc-vfpw, MINI-82p9-cgmg-fqwv, MINI-82q8-qq6q-7qv6, MINI-83cx-vq33-9fqw, MINI-83h7-5wfr-gmcx, MINI-84xf-hv38-86vf, MINI-857j-85qr-w5mm, MINI-85pr-q8wm-8w66, MINI-874x-xjjx-hrvx, MINI-8797-6cq7-3fpv, MINI-87g7-9hpr-5pxx, MINI-87gm-4qwh-x52f, MINI-87gr-p37h-p8x9, MINI-89gj-h2gq-x83f, MINI-89jf-5cw7-x3hc, MINI-89xm-r3cv-vwpg, MINI-89xw-7ff4-fjp3, MINI-8c3p-v3mx-2cgj, MINI-8c6q-39j7-jvg9, MINI-8cf2-m465-6624, MINI-8cff-jrrc-mpr3, MINI-8cgr-7h3v-wmrf, MINI-8cp4-28x3-gcqq, MINI-8cp6-2f9w-qp8v, MINI-8cx9-w7w7-3ggr, MINI-8f4x-8984-88rr, MINI-8f6g-fvq8-wrcj, MINI-8fmg-xhwm-7f55, MINI-8fx9-8g3r-6j82, MINI-8g6r-cw53-jf85, MINI-8gj9-86vf-986m, MINI-8gjp-8cxj-gr35, MINI-8h3m-r3ch-54qv, MINI-8h3v-rh4q-x3gx, MINI-8h96-fx3p-rf48, MINI-8hcf-vw5j-qqvr, MINI-8hjq-m7hf-3pj9, MINI-8hv3-q7rf-p4xm, MINI-8hvx-87v7-j3mh, MINI-8jwm-59hc-q2vf, MINI-8m52-g9gh-8hmw, MINI-8m7f-f4f5-v4v7, MINI-8phh-7jj8-h464, MINI-8q35-fcp8-24pw, MINI-8q3v-hr5f-677c, MINI-8qcx-6732-jpw9, MINI-8qg6-77jh-h363, MINI-8qgm-f26j-frxm, MINI-8qw8-c787-62pr, MINI-8r75-95w4-p7w3, MINI-8rfw-2w72-hqh5, MINI-8rg4-65gf-f424, MINI-8rgx-7445-5659, MINI-8v6f-jj63-q9j9, MINI-8v7w-gwvc-8x72, MINI-8vhc-jgpm-68fr, MINI-8w42-w7hh-3qw6, MINI-8wcx-4rm7-grxf, MINI-8wp4-qv78-mxm6, MINI-8wqj-87p8-v47j, MINI-8x4r-4cpj-8cm5, MINI-924j-gjpg-h374, MINI-92fr-mjw9-wmrx, MINI-92hf-6x33-9c5w, MINI-94rp-3mhx-x459, MINI-94rq-52pw-5g63, MINI-968x-g22v-8xg2, MINI-96fm-pvr3-5xjr, MINI-96h3-v5vp-9q87, MINI-974c-8hc7-hxx5, MINI-976j-r98x-pf3g, MINI-978x-6gh8-3q3m, MINI-97fw-88g9-2c5m, MINI-97gc-hgxx-2m29, MINI-9838-xxcf-7hwg, 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MINI-c3jw-r8m2-whxx, MINI-c3p7-2472-33jr, MINI-c4gw-rghx-ph89, MINI-c4hf-gq28-2g8g, MINI-c559-3qxf-8799, MINI-c62v-2w2h-4hqc, MINI-c66q-jhrh-jfjx, MINI-c6qf-jpx6-gmxr, MINI-c6vx-6j7x-vr2r, MINI-c6w7-47pf-xcmf, MINI-c77q-gfv7-jgfp, MINI-c7rm-pm9v-h275, MINI-c8xv-pjmc-p2fq, MINI-c95f-6rff-crx2, MINI-c9mr-hpwq-8fwj, MINI-c9vc-2xv9-2ghc, MINI-cc29-rjxc-5j35, MINI-cc8g-3h39-7hjw, MINI-ccc3-524v-vvrc, MINI-cchr-j24m-6g4g, MINI-cf35-64hw-mwmx, MINI-cf43-387j-vxj6, MINI-cfgj-qqvx-jhfg, MINI-cgjv-7hxf-8x46, MINI-cgvh-6hpr-wgjw, MINI-ch87-97fv-j897, MINI-cjc6-r77p-rjjw, MINI-cjg9-37pp-jcw4, MINI-cjm4-29xx-97hp, MINI-cmf4-qgf9-ch7m, MINI-cmjf-hq8q-2r2r, MINI-cmwv-96r5-3m8r, MINI-cpw2-vq2f-8f8j, MINI-cqmh-gm5f-v8jv, MINI-cqr3-6mgw-qmf3, MINI-cr9x-98wg-7jv5, MINI-crg3-fpj9-7cmc, MINI-crj9-hgvp-h36g, MINI-cv45-3hpg-4p5g, MINI-cv96-qjhr-fx6p, MINI-cw34-wqhp-xmv3, MINI-cwcm-vhhw-jf5r, MINI-cwqm-qvwv-3hm6, MINI-cwv9-f855-p69j, MINI-cwvh-7qjp-c6xp, MINI-cwxx-pc4g-x3w5, MINI-cx3w-4v52-8f5r, 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MINI-rf96-6pw2-mc49, MINI-rfjx-p4cm-v43m, MINI-rgm5-5qvx-5hj6, MINI-rhf9-6qgg-jhxq, MINI-rhfh-m4h8-m7vf, MINI-rhh9-8xx4-gg2c, MINI-rhhv-x3gv-j6q7, MINI-rm7f-g2hv-fmxr, MINI-rmjh-2rq4-c3f3, MINI-rmxc-x27f-988v, MINI-rmxr-w26q-8mrr, MINI-rp8c-8gjm-fghc, MINI-rpx4-c678-qvc3, MINI-rq7f-mcgp-6hc2, MINI-rq8g-g35c-p622, MINI-rr82-v5fm-rh68, MINI-rrfm-mg96-3f7c, MINI-rv4v-xh9w-ggrr, MINI-rv7f-52hp-67mm, MINI-rvrx-4vfq-mwg3, MINI-rw33-2c8r-jw29, MINI-rw75-2qgp-97r4, MINI-rwhf-m9fp-56gv, MINI-rxcm-v3v3-pg99, MINI-v297-26fw-p88r, MINI-v32c-7m73-rqx8, MINI-v38g-jhhc-6669, MINI-v3h3-qx86-wc8x, MINI-v3mw-qxjr-736x, MINI-v3qw-6p3p-wh4q, MINI-v4q6-qq57-3m2p, MINI-v4qx-wqj6-gc5v, MINI-v4vr-c3gj-9p68, MINI-v53x-5p4x-49w5, MINI-v5gh-jmhh-m3xf, MINI-v5q3-6vwm-7h5c, MINI-v69r-788v-rqxc, MINI-v6qg-hj67-rxjv, MINI-v77c-w29h-j8qg, MINI-v7p3-g68x-3qcc, MINI-v7pw-jvrj-mc97, MINI-v7r7-g9vh-hhj8, MINI-v8qf-33w8-m92q, MINI-v927-mfg8-v659, MINI-v92h-m3qf-86cx, MINI-v9vg-x64q-f86q, MINI-vcf9-xqh8-43v9, MINI-vcrm-86xj-hww4, MINI-vcvm-fgw8-hjx8, MINI-vfc4-p9m2-4r2w, MINI-vfmp-j6w8-9pqh, MINI-vfvw-6q26-r8h8, MINI-vg3m-g67q-gvg9, MINI-vg57-3g39-hrv9, MINI-vg75-g5c8-4922, MINI-vh4g-pr7x-w9rv, MINI-vj5w-3342-m446, MINI-vj9g-5vp9-73q3, MINI-vm75-5pr8-32f4, MINI-vm8x-4548-r2jm, MINI-vmvg-pf4w-9483, MINI-vp38-5xr6-f5hr, MINI-vp55-9q88-7r73, MINI-vp74-834j-7mff, MINI-vpfx-mmx8-cwg6, MINI-vq3p-84c4-pw5c, MINI-vr3g-c655-q2cf, MINI-vwh3-cg8w-mr62, MINI-vx7x-xfmw-37x7, MINI-vxc7-cccx-j6f4, MINI-vxj2-7gvg-xpwr, MINI-vxj2-xpjm-3gwf, MINI-w243-c3cv-98mg, MINI-w2gq-hr2f-m6gr, MINI-w37r-33v5-vw56, MINI-w3h3-gq7q-p329, MINI-w3hr-8h74-fhvc, MINI-w42j-45mg-95wh, MINI-w4xh-hq94-wg6x, MINI-w58x-3h63-9c6p, MINI-w5cq-f82j-c2jx, MINI-w6gw-mxcw-3rr7, MINI-w7mp-w55x-23jw, MINI-w87x-j67p-r9r9, MINI-w89j-j65m-g55x, MINI-w8jr-h8pp-px2r, MINI-w8v2-9m8p-562r, MINI-w9w2-57jw-qmxr, MINI-wc85-mmmq-vfhv, MINI-wcfh-xp3w-gwwm, MINI-wcgw-jmp2-xx3f, MINI-wcjq-5cxc-mq3j, MINI-wcph-88m2-ggvj, MINI-wcv6-9fcg-j9fc, MINI-wf8p-4m7q-f465, MINI-wfxc-9286-mmx3, MINI-wfxp-xcpv-2cfg, MINI-wgg6-9m72-rw6m, MINI-wgh9-pg75-5qhm, MINI-wgrj-x398-fwfg, MINI-wh6w-rfvf-fmjv, MINI-whgp-6gcr-4585, MINI-wj3v-jph8-qggr, MINI-wjfp-rv4r-j57j, MINI-wjmf-2vmc-w5pg, MINI-wjmq-xvcp-xh9h, MINI-wm25-9f6w-3fqq, MINI-wm3f-pmpv-vgc8, MINI-wm3p-7ghp-9567, MINI-wmrw-rc7c-9w95, MINI-wppp-3p6r-28g9, MINI-wq3p-r7c3-v5c7, MINI-wr3h-3v28-3g3j, MINI-wrhm-mc7f-r7h3, MINI-ww35-fc35-p5m5, MINI-ww9x-v2h7-xv2m, MINI-wwmx-583j-rfhx, MINI-wwxh-jcxx-j54g, MINI-wxxv-6x8w-8vvm, MINI-x24h-32cq-3x8j, MINI-x2xx-g3xj-cmqv, MINI-x42g-h3qx-7f4c, MINI-x44p-88v2-hqcc, MINI-x464-vv93-47cc, MINI-x46h-g3vp-hcv9, MINI-x4g6-7f2c-4v7p, MINI-x522-mrwr-q593, MINI-x5q7-43qr-2cmg, MINI-x5r7-vc9x-r955, MINI-x658-6795-9r8m, MINI-x67f-hmhj-q5jx, MINI-x735-ffmp-f2xh, MINI-x73f-46qx-5jmm, MINI-x793-pf69-3m36, MINI-x7fx-9qw4-vgmg, MINI-x7pf-3858-rx6w, MINI-x837-h8qh-qm2x, MINI-x8fv-h4xp-2rcq, MINI-x8j7-78m8-5mrp, MINI-x8p6-vgxj-qcrh, MINI-x9qm-vq3q-6p3q, MINI-xc34-rc4x-6m3r, MINI-xc54-hfq4-4784, MINI-xc6p-wmv8-6wxv, MINI-xc7j-m9x3-f9r9, MINI-xf9c-r25w-gp5f, MINI-xgfm-vwrj-w5r4, MINI-xh48-gv6c-rjv2, MINI-xh79-qvxf-223v, MINI-xhc3-xwrg-wpc3, MINI-xhr9-xc6j-xc4g, MINI-xjgh-pm86-x7j2, MINI-xjmp-vxvv-pqhx, MINI-xjr9-x2m2-mxq3, MINI-xm3m-3vqw-78h6, MINI-xm8v-w4pw-qfw2, MINI-xp4f-mxwm-r992, MINI-xp8j-pjw9-2c37, MINI-xpjr-xg2r-wfvm, MINI-xpmh-p55h-9g42, MINI-xq46-c57j-m7gv, MINI-xqpp-5vgw-mvm3, MINI-xrqp-4cf6-pjcr, MINI-xvgq-97f7-7f44, MINI-xvhw-pwrc-vw7q, MINI-xvjf-mj6v-9398, MINI-xvm3-88x8-pq6m, MINI-xwqv-28v5-cgq5, MINI-xx6c-2fxr-vpmj, ROOT-APP-GOBINARY-CVE-2026-39827, UBUNTU-CVE-2026-39827

## What is CVE-2026-39827?

CVE-2026-39827 is a medium-severity denial of service vulnerability in golang.org/x/crypto/ssh, published on 22 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.

Weakness: CWE-924 (Improper Enforcement of Message Integrity During Transmission in a Communication Channel)

## Which versions are affected by CVE-2026-39827?

3 open source packages ship an affected version, including golang.org/x/crypto. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `golang.org/x/crypto` | Go | All versions | 0.52.0 |
| `golang.org/x/crypto` | Go | All versions | 0.52.0 |
| `golang.org/x/crypto` | Go | All versions | 0.52.0 |

Products: Golang Crypto.

## How do I fix CVE-2026-39827?

Upgrade golang.org/x/crypto to 0.52.0 or later.

## Is CVE-2026-39827 being exploited?

There is no known exploitation of CVE-2026-39827 in the wild and no public exploit code.

## Other vulnerabilities in golang.org/x/crypto/ssh

- [CVE-2026-46595](https://insights.sbomify.com/CVE-2026-46595/): Invoking VerifiedPublicKeyCallback permissions skip enforcement in golang.org/x/crypto/ssh (critical 10.0)
- [CVE-2026-39830](https://insights.sbomify.com/CVE-2026-39830/): Invoking client can cause server deadlock on unexpected responses in golang.org/x/crypto/ssh (critical 9.1)
- [CVE-2026-39831](https://insights.sbomify.com/CVE-2026-39831/): Invoking bypass of FIDO/U2F security keys physical interaction in golang.org/x/crypto/ssh (critical 9.1)
- [CVE-2026-39832](https://insights.sbomify.com/CVE-2026-39832/): Invoking agent constraints dropped when forwarding keys in golang.org/x/crypto/ssh/agent (critical 9.1)
- [CVE-2026-39833](https://insights.sbomify.com/CVE-2026-39833/): Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-39827 and fix it if it is affected.

What it is: CVE-2026-39827 is a medium-severity denial of service vulnerability in golang.org/x/crypto/ssh, published on 22 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-39827 in the wild and no public exploit code.

Affected packages and fixed versions:
- golang.org/x/crypto (Go): affected all versions; fixed in 0.52.0
- golang.org/x/crypto (Go): affected all versions; fixed in 0.52.0
- golang.org/x/crypto (Go): affected all versions; fixed in 0.52.0

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-2026-39827/ (Markdown: https://insights.sbomify.com/CVE-2026-39827/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-39827
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-39827
- OSV: https://osv.dev/vulnerability/CVE-2026-39827

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-39827/
Summaries are generated and may contain mistakes; the official description above is the record.