# CVE-2026-39819: Invoking "go bug" follows symlinks in predictable temporary filenames in cmd/go

> An attacker can overwrite arbitrary files via symlink attacks when the go bug command writes to predictable temporary filenames.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 7 May 2026
- **Updated:** 8 May 2026
- **Also known as:** AZL-98826, BELL-CVE-2026-39819, BIT-golang-2026-39819, CLEANSTART-2026-NT43393, CLEANSTART-2026-VA36880, CLEANSTART-2026-WS35873, DEBIAN-CVE-2026-39819, GHSA-5m4p-2gjx-p2g8, GO-2026-4978, MINI-23mf-v57c-475p, MINI-24j5-v4m9-mhvp, MINI-24p3-r8g9-phrq, MINI-25v4-qmw9-vrrr, MINI-25w9-f8vp-v5mh, MINI-269h-9489-c43m, MINI-2725-r4q4-vp4p, MINI-27cx-x6r9-3p4j, MINI-27h9-hjgc-fmj5, MINI-289g-f7q7-vfr4, MINI-28vq-wvwq-hmwm, MINI-293w-xrqj-2q5w, MINI-29gw-mqvv-xpqr, MINI-29rr-m988-h3cj, MINI-2fh2-4729-6x8c, MINI-2fp4-67ph-xqmf, MINI-2fq9-r2pr-rmwq, MINI-2frf-5wm5-vwhj, MINI-2fw8-f649-hpgm, MINI-2gcx-grcp-93h3, MINI-2gwv-2jpw-6h93, MINI-2j2j-wqqr-w8x5, MINI-2jxf-fq38-wf3v, MINI-2mrp-9fv8-q53j, MINI-2qg7-3j67-4ggv, MINI-2qqv-xhjw-g746, MINI-2qv9-x3rr-gxp5, MINI-2r6p-fhqp-9prq, MINI-2w64-mgq2-vh3j, MINI-2wjw-f6xm-hhwc, MINI-2wxm-jfxj-89f8, MINI-2x35-rwf9-73cr, MINI-2xfr-3g88-vp53, MINI-2xm5-f28x-2v67, MINI-3283-px9x-x5xr, MINI-32f4-g8fq-8pjm, MINI-32gh-6xpf-whmq, MINI-33gf-c226-6jj8, MINI-33j7-p449-mxc6, MINI-33mm-cgj4-9qq4, MINI-3456-wjp7-q7jg, MINI-34cj-ch8w-fqgh, MINI-34h6-hcff-5pfc, MINI-3643-jm6c-9895, MINI-374f-v7mx-2mg2, MINI-37cq-vm9p-m9v4, MINI-384g-46cq-w9c5, MINI-387w-6v4q-2jpv, MINI-38gv-p84p-p85j, MINI-39g7-7xc6-2jrr, MINI-3c93-rxjc-jr25, MINI-3cwf-g639-m3hj, MINI-3f4v-hr2r-3294, MINI-3fpm-gp2p-jw53, MINI-3g7f-hfpw-7fcq, MINI-3gqf-g374-cfw3, MINI-3gqj-v46w-w5x3, MINI-3h52-389c-v7g6, MINI-3hh4-7jq8-75w7, MINI-3hwx-638m-h6m5, MINI-3j5j-44m2-gp72, MINI-3jhw-rmwm-qp76, MINI-3jm9-4q4r-87j4, MINI-3m7c-cqfm-8qvx, MINI-3p39-3vh9-gm3f, MINI-3p7q-x8r2-6r97, MINI-3pf5-v6ph-rcvx, MINI-3q33-qf3j-f8fp, MINI-3qp4-mp6q-h557, MINI-3rwg-pwr4-j5hw, MINI-3v6f-c9x7-grmg, MINI-3vc8-5hpp-2pmj, MINI-3vwj-jjc2-8wq5, MINI-3wxg-82xj-jw4p, MINI-3x3j-9hrm-vh46, MINI-3x8c-vrg3-jgxr, MINI-4246-rc38-8jrg, MINI-426x-36qh-2hp5, MINI-429v-4wq7-p87p, MINI-43qq-f63x-j6fc, MINI-4443-fqxm-2jp3, MINI-44xc-gr2g-j56q, MINI-45jg-c2jj-7w8q, MINI-45r2-vv2m-f6v6, MINI-47fm-mpq9-5mp2, MINI-47gh-9h8m-rqrw, MINI-487q-28f5-v6q6, MINI-4957-wrr9-5ffj, MINI-49g5-2877-2r47, MINI-49qh-748m-3pqh, MINI-49w2-c939-f59f, MINI-4c27-65g5-98xx, MINI-4f35-wpch-x6x5, MINI-4f97-8g22-x22v, MINI-4f9m-r5rp-f8gm, MINI-4fqq-hhpq-g4hv, MINI-4gh8-vcx7-rv9q, MINI-4gwf-x3m2-j2q9, MINI-4jh7-fx73-9vh6, MINI-4mc3-92j5-xhf8, MINI-4ph4-h37q-4jmf, MINI-4pmh-h8fj-6g2q, MINI-4pxm-8vwf-gwhh, MINI-4qj6-hv8f-wvgw, MINI-4v53-6p2x-8wpp, MINI-4vcq-46gx-h9x8, MINI-4vcw-3hr9-2gq8, MINI-4vhf-rw9f-wqm6, MINI-4vhw-6wwr-5x3x, MINI-4vrh-wp2q-h9qh, MINI-4vrq-cr78-34f6, MINI-4x9f-rp35-x9m2, MINI-4xwp-jppf-5v5m, MINI-4xxv-cjcc-j4wh, MINI-5234-hg75-6h2h, MINI-523c-g845-5j2p, MINI-54w4-qvmj-r76x, MINI-54x6-qpq8-pfgp, MINI-55gc-r2w8-23h8, MINI-55pj-gpxm-4fg8, MINI-5652-gg8q-pr24, MINI-56r3-w5vh-cwrv, MINI-57cp-jp7x-4hmw, MINI-57m7-rgw9-j244, MINI-5829-9vcq-pr2m, MINI-586w-rr3j-hxrq, MINI-58rx-7rpv-h7fx, MINI-58wx-6vc6-xqj5, MINI-58xc-45xg-hgp5, MINI-5968-cghp-2fgw, MINI-59mq-c74f-9r26, MINI-59qf-7jg8-vhqv, MINI-59r7-vhjf-rr23, MINI-5cm7-99gg-jxcv, MINI-5f9q-cc9x-73jg, MINI-5g5h-pvxq-mcmj, MINI-5gjq-vcm5-v53r, MINI-5gv6-242g-c56j, MINI-5h44-jmp9-xp8p, MINI-5h9x-wcmg-6hh9, MINI-5j5v-ppp3-5868, MINI-5jjr-4h8c-3cgw, MINI-5m6v-v238-2wr2, MINI-5mmf-6r2p-99fw, MINI-5p4r-c2vr-58xg, MINI-5pfp-6qxj-gj8f, MINI-5pfw-c7xg-jgw7, MINI-5q29-7mx4-w7cw, MINI-5rx6-79p9-7vq4, MINI-5vvj-qrp4-wpfc, MINI-5wg2-f9r9-9xq5, MINI-5wjq-6xhj-9q9x, MINI-5wmx-m67f-2mrc, MINI-622w-c4gq-prxv, MINI-62jj-g6q3-9q89, MINI-62wg-hc95-5968, MINI-632g-53wv-vp9h, MINI-638c-rp93-hmh9, MINI-64f9-wwq7-p225, MINI-64r2-gjfg-95mj, MINI-67hv-qch3-3wj8, MINI-684q-wfvw-pwr9, MINI-68f6-3r67-fvff, MINI-68j3-v6ch-vrfh, MINI-69q8-7v6x-mf6h, MINI-69r9-g93w-c2pq, MINI-69x8-m9cv-qwmc, MINI-6c92-4c5c-p4vj, MINI-6cgc-f56x-q6r7, MINI-6cgv-p929-vf3h, MINI-6fph-v7r3-6pcv, MINI-6frc-gm5m-h7hh, MINI-6fxm-mx6w-hvgf, MINI-6gh6-92mc-j5xj, MINI-6h8m-hcqp-vhch, MINI-6m7w-2q7g-hfp8, MINI-6m9m-97qg-7g4v, MINI-6mh6-2f9j-h259, MINI-6ph7-r95m-25fp, MINI-6q9x-5xpx-5chg, MINI-6qq9-wmq5-gw4w, MINI-6qqv-jg8h-p7w3, MINI-6r5x-3f2m-xw6f, MINI-6rrv-fxj9-6xh4, MINI-6vhw-q3jf-xj74, MINI-6vjc-4f86-rmmm, MINI-6w35-9j98-g42g, MINI-6wpc-h45q-g6xc, MINI-6wr6-cxj4-v773, MINI-6x5v-82h7-7m23, MINI-6x93-9p4v-m2f3, MINI-6xhw-rvf9-vq7c, MINI-6xjw-23c5-6qhm, MINI-725v-pqfw-rw4w, MINI-72pc-8p26-pw43, MINI-732h-p4qv-mpqv, MINI-74q8-3864-fjch, MINI-754c-g55q-77hh, MINI-7589-jqc3-2jg4, MINI-7628-53p6-hv3r, MINI-76cg-q95f-5hw7, MINI-773m-4qj2-ph3c, MINI-7778-wrg3-7mvx, MINI-77gx-8gwh-m5q7, MINI-78ch-gxqc-6xm6, MINI-78p9-2v52-rgxr, MINI-78x7-5grm-mpvx, MINI-7975-2f7j-q5hj, MINI-79jx-9gmj-59wx, MINI-79pg-3w2w-v56j, MINI-79rh-h47r-vprj, MINI-7cpg-f9j4-prmv, MINI-7cq5-ccfm-3gm5, MINI-7cv4-vxw8-6rf2, MINI-7g7m-2wc3-mrmx, MINI-7hfq-736q-4wcr, MINI-7m28-fx6w-qc8j, MINI-7m77-2qrq-6jhj, MINI-7pm4-9962-9f52, MINI-7pmc-c83c-j79j, MINI-7qqr-rh99-qcjx, MINI-7r7m-gw73-f82r, MINI-7rxh-48x3-x8g6, MINI-7v6x-4h27-wgrg, MINI-7vc4-cx85-xhr5, MINI-7vmv-6xj3-jhrh, MINI-7w27-9phv-74j6, MINI-7w5p-3xxh-6vj2, MINI-7x3m-j7m7-5m7q, MINI-7x9q-87xr-j2r3, MINI-7xwc-gvfx-5jvp, MINI-82pr-ghr4-86x6, MINI-835p-xm6x-7gx6, MINI-8483-v53x-8fmv, MINI-848h-qj6h-h8vp, MINI-84f8-w3ph-2x9v, MINI-84q6-p585-wjrc, MINI-853j-m7qc-35mp, MINI-85rh-4h55-9863, MINI-85wm-whq9-p375, MINI-87vj-9xxw-37fg, MINI-887j-6h9x-c6g4, MINI-889m-4xjf-7xc7, MINI-88gh-gww8-jgc3, MINI-88mw-4wv7-vj3m, MINI-894r-q457-p4fw, MINI-897x-5q5p-46qm, MINI-89fx-7f77-g8g9, MINI-89jq-4h57-q8p7, MINI-89rr-jxpr-877w, MINI-89wx-chc7-hmhm, MINI-89xv-66vx-qhxh, MINI-8c3h-qx86-9p9m, MINI-8cv5-9pj8-gcmj, MINI-8h9v-g29f-wj23, MINI-8hf9-8cjm-93v2, MINI-8j9f-rwpf-ppfm, MINI-8jmp-xc7p-96jv, MINI-8jw6-9m7g-77jv, MINI-8jwx-4r2f-g8v2, MINI-8m6r-3qqm-2xqr, MINI-8mmh-9w6m-w645, MINI-8pf7-p5m6-4r8j, MINI-8q43-pffg-7557, MINI-8q5r-8pm6-56v8, MINI-8qcp-3p2j-6mgv, MINI-8r6h-pf6w-m4gh, MINI-8w9p-m586-c48x, MINI-8wx7-hgjm-fw6m, MINI-8x48-67h4-57q8, MINI-8xjp-mh5m-2hm2, MINI-932r-899r-8474, MINI-9355-xww4-8j3f, MINI-93gg-4mh2-2w39, MINI-94fm-xgmc-vx6f, MINI-94m7-j6hj-99xm, MINI-94xx-x8xj-v349, MINI-95g3-m35w-g493, MINI-95jw-q7hw-xrcp, MINI-978w-5999-h832, MINI-97g5-5w55-r624, MINI-97h8-wcvr-5m3m, MINI-97mp-8986-cpgr, MINI-9945-8g75-xv92, MINI-99cp-8pc9-2jmw, MINI-9c6f-wp4v-c76v, MINI-9c8w-qjg3-r34p, MINI-9cg2-8v8v-cg59, MINI-9cmp-vx93-3327, MINI-9cr9-w24q-xm8w, MINI-9cwq-v3w4-gh2v, MINI-9f65-3x6w-ppx7, MINI-9f6f-xvhm-4gmv, MINI-9fgx-v62j-8mh2, MINI-9fhc-gx36-hmc8, MINI-9gqp-27rr-vgfq, MINI-9gx2-66gc-h57m, MINI-9hwv-46xh-mmmq, MINI-9hxx-fp76-gvfc, MINI-9j43-3qjh-cc4f, MINI-9j5f-439x-726f, MINI-9jxj-87cr-2gmx, MINI-9m3c-mgwg-88v5, MINI-9m44-qr37-785h, MINI-9p9c-5fhc-24qp, MINI-9pg6-88p5-px8m, MINI-9ph3-h8v8-wjvh, MINI-9qcx-2hgc-r5h7, MINI-9qrg-wfwg-jvcq, MINI-9v36-pvxh-f9qg, MINI-9vmh-ph2c-x4vm, MINI-9w56-3v5f-hj9v, MINI-9w5x-r73p-c823, MINI-9wj2-w458-r3g6, MINI-9wpf-w95p-62c5, MINI-9wr3-f34m-vq8m, MINI-9x8r-xpvh-cwqx, MINI-9x9f-2qqc-65cp, MINI-9xvx-jh8q-p58g, MINI-c222-64hp-86wc, MINI-c2cc-f2xh-9qx7, MINI-c2p6-mcxx-cq5c, MINI-c3fp-c625-8pwp, MINI-c3rp-2xch-j46p, MINI-c3vp-4542-6fv5, MINI-c427-f623-ph7q, MINI-c49m-4754-22h2, MINI-c4fc-3j92-6qj2, MINI-c62q-c8q7-v4rf, MINI-c756-6xgf-6g2h, MINI-c776-434r-r8vr, MINI-c7cq-mqr5-hvch, MINI-c7gv-c4g4-m987, MINI-c7v5-hhhr-m66m, MINI-c892-h6xw-9hvj, MINI-cc8w-jrpg-5v55, MINI-cccr-7qrc-g3jm, MINI-cf29-g89p-29hv, MINI-cf3v-v385-gxf2, MINI-cf7r-qcc8-32jh, MINI-cf85-hx4g-q2vh, MINI-cg5c-w4g3-m354, MINI-cgwx-fhw5-69f8, MINI-ch83-2pv8-5qjp, MINI-chg7-xgq4-r7ph, MINI-cjf5-vcg2-94rv, MINI-cjqc-724v-5qvp, MINI-cmxp-mg7h-v48g, MINI-cp65-7h7x-fchc, MINI-cq7v-w8xr-fpjr, MINI-cr5p-xf83-p5w7, MINI-crc2-66pm-8mfm, MINI-crwx-jjq8-prp6, MINI-cv2h-mgfv-74x9, MINI-cv44-298r-hrj9, MINI-cvx8-qg2v-m3jq, MINI-cw4v-v5xv-vj9q, MINI-cwf9-jc9x-qfrf, MINI-cww4-w6rj-8cf9, MINI-cxhj-fm7g-gh6h, MINI-cxj7-m2m8-78hp, MINI-f243-rm3f-jp3m, MINI-f2xx-p29w-575r, MINI-f37q-ffm8-9jqf, MINI-f3fv-v7r2-hjv7, MINI-f488-6ffh-gf8h, MINI-f4wv-8c68-8mrg, MINI-f69x-825r-hv8q, MINI-f92m-4wwc-fg3w, MINI-f96j-572j-xjh5, MINI-f989-xgc2-7x35, MINI-f9c7-v8hp-g5p2, MINI-f9qp-cp9m-3mf3, MINI-fc5r-2h2p-fcwp, MINI-fc68-gh3m-m397, MINI-fc6f-cp8p-x5h2, MINI-fcrj-v5gv-9x7r, MINI-fcvq-22pj-63rc, MINI-fghg-m3cp-wjx9, MINI-fhfq-mg7g-r8gf, MINI-fhpp-3hhw-58hr, MINI-fj33-6jv4-2h9j, MINI-fjv6-7qmm-gx6p, MINI-fjxr-qwh5-6fjq, MINI-fm6h-v38w-9w38, MINI-fp6g-h7qc-xxf4, MINI-fqwg-2p2j-xpv8, MINI-fr7m-hvm6-8r8m, MINI-frh2-wp3p-mqqv, MINI-frpv-p65m-7wh5, MINI-frqm-2h7q-pg7f, MINI-fv47-6xwh-f472, MINI-fv7g-rrvg-783q, MINI-fv9r-cg86-x4j6, MINI-fvgp-c9ff-46v4, MINI-fvx4-gcv5-j2pg, MINI-fwvc-m33c-83cx, MINI-fx85-rmww-pghc, MINI-fx87-9jh5-v692, MINI-g254-wpr3-xxxg, MINI-g27f-cp49-w2xx, MINI-g282-x3qv-gxr4, MINI-g2gr-qh72-48wc, MINI-g2p9-jj8j-p6p3, MINI-g338-xrgw-cfg8, MINI-g3xg-292c-mjfr, MINI-g5xg-q9rp-7chg, MINI-g646-gw86-vvv6, MINI-g6mx-wqq6-hv2q, MINI-g73x-fvgg-j8xw, MINI-g7c4-cx52-r854, MINI-g7mq-g3hm-fcrc, MINI-g7v8-984f-347q, MINI-g855-w75g-qqq4, MINI-g8j8-c3pj-m8mq, MINI-g9mc-6fwm-wfhh, MINI-g9xc-hp5f-xwhg, MINI-gc2g-46qv-4hwr, MINI-gc85-fcwp-hq3x, MINI-gcrg-wqx6-hc32, MINI-gfq2-x74w-6223, MINI-ggcp-j3p2-r29m, MINI-gh76-9g2p-v765, MINI-gh9r-m4fr-qmpp, MINI-gjx3-5fg7-jfpw, MINI-gmh3-wf2c-pv6p, MINI-gpc5-vm5g-c7cx, MINI-gq5m-gjwx-x25r, MINI-gqvf-3f39-46fg, MINI-gr47-v8g5-wpqf, MINI-gr6j-4rjp-m86c, MINI-gvh7-72v2-c838, MINI-gwc8-4w8x-rcrx, MINI-gx22-vp2g-82h3, MINI-gxg2-vq3p-gc9v, MINI-h2cq-w2wr-2vff, MINI-h2h3-3fcp-v2rx, MINI-h2qq-7mgj-hx2m, MINI-h2v4-wrh3-wp85, MINI-h2w6-qmxx-3gxq, MINI-h3h8-hmjv-ccrr, MINI-h49g-x54v-x2q4, MINI-h4qr-5p3p-7299, MINI-h4vw-jp78-838h, MINI-h5cr-qw5x-j5h3, MINI-h66x-3gx5-j7j3, MINI-h6rc-cv6x-qhj5, MINI-h6x2-f7mp-ppjx, MINI-h858-4wh4-vr35, MINI-h8f2-w92x-67rm, MINI-h8wf-c4wv-69cm, MINI-hc5r-h9p5-3h5p, MINI-hfpm-rwqg-2q9w, MINI-hg3q-j3fx-m2p4, MINI-hgfv-7j7q-wg79, MINI-hggf-5r7w-cm76, MINI-hh5m-vrg7-99mh, MINI-hjc9-4hw9-6f34, MINI-hjfv-3qp5-59rj, MINI-hmfj-mvj7-c8mq, MINI-hmwj-3hjh-v5q6, MINI-hmx6-56fq-cq23, MINI-hpmp-rhj6-3c89, MINI-hq76-3j4c-fwww, MINI-hq7c-m4jf-6c95, MINI-hv29-mpv9-5xrr, MINI-hv3g-hvvv-jw6m, MINI-hwrr-g776-5pw3, MINI-hwx6-cvr5-c8g6, MINI-hx56-595f-vm3m, MINI-hx59-jp88-6w74, MINI-hxqx-rcw7-grr2, MINI-j26h-pv5c-jvmj, MINI-j27h-rgh6-363r, MINI-j29f-4v7r-vmj6, MINI-j2v7-3gqf-gwmp, MINI-j3hx-mgmp-5h6r, MINI-j3x5-4pfg-2pqg, MINI-j48p-gfh5-33mf, MINI-j4g9-9v9r-8vjc, MINI-j543-xcmf-7whx, MINI-j55w-c5c6-xrch, MINI-j57x-2jp6-8crp, MINI-j5fr-chj2-rrpr, MINI-j77j-jgqg-5r89, MINI-j7xv-gmc4-m99m, MINI-j835-6xxq-gq89, MINI-j8v5-8p99-236w, MINI-j98v-cpmg-pg2v, MINI-jcfv-wpvw-6q6h, MINI-jcpj-2qr2-qq96, MINI-jcrq-cjq2-w994, MINI-jcw2-fcp7-jhx9, MINI-jf8w-83gr-8hf3, MINI-jf96-x83v-qv4m, MINI-jfvw-w236-jgc8, MINI-jfx5-5r55-94mc, MINI-jhhf-5fx4-7j54, MINI-jjh5-vpfp-vjhx, MINI-jjwf-78v7-6hrr, MINI-jmcp-mhgc-944g, MINI-jq4w-5rhw-6vxc, MINI-jq5q-4qw2-6jp2, MINI-jqxp-8mx4-3xvf, MINI-jr2q-6g97-j44f, MINI-jrch-rfvw-wpgf, MINI-jvwq-xwq7-f69x, MINI-jw2r-cmc2-qhw9, MINI-jw93-pg97-c6jh, MINI-jwf6-pcr2-9hxp, MINI-jwph-vphc-2vcf, MINI-jxqm-439r-qcc2, MINI-m23h-rcq5-qrrv, MINI-m283-c275-93hg, MINI-m2xr-5w86-6r3q, MINI-m332-6mrg-8x72, MINI-m393-gf2h-hfm6, MINI-m422-fgh5-c6fv, MINI-m432-8j87-788f, MINI-m46x-897p-q47x, MINI-m472-hgp6-q5hp, MINI-m5cw-5q7m-hr2m, MINI-m5xf-jfwp-5jwg, MINI-m6h4-3m5h-fjr2, MINI-m76f-28c6-pvwg, MINI-m8wv-m872-wccq, MINI-m8x5-44v8-h7gx, MINI-m9c6-pch6-rf8c, MINI-mc3v-rgm7-jx2w, MINI-mcpp-45vj-98m7, MINI-mcr3-6m72-vph9, MINI-mcv7-v97q-78j5, MINI-mgp4-99gm-r4rq, MINI-mgx8-mxqv-w95x, MINI-mh5f-f938-4fx6, MINI-mh9m-2f6p-3g86, MINI-mhj4-qq8c-2cr8, MINI-mj9w-h5fx-9wqh, MINI-mjr6-2fr6-97m7, MINI-mm9h-xxwr-c68x, MINI-mmfw-7jrg-v9fp, MINI-mmjj-768q-8wgc, MINI-mmxw-2v67-qgcq, MINI-mp2g-qrw4-pm9p, MINI-mpvf-m97w-6whc, MINI-mq4p-49hv-rvqg, MINI-mq5j-8gr7-vjfj, MINI-mqcw-gwwr-4c7r, MINI-mr38-jhf2-37p8, MINI-mr4q-m345-g4mj, MINI-mrvc-3c89-gqwf, MINI-mrwc-mgrx-m26f, MINI-mrwp-q4g2-29ff, MINI-mv7c-cgr8-pf9g, MINI-mvpg-qqqq-rx63, MINI-p27m-qwg8-9w39, MINI-p2j8-pv3q-67vf, MINI-p2p4-647j-xph9, MINI-p3cx-xhvv-mcw2, MINI-p3fh-xw8h-pxjh, MINI-p3fx-w365-j73x, MINI-p3gx-m4hp-7jr4, MINI-p4fx-6w9r-3mjq, MINI-p4h6-rrc3-q89c, MINI-p4qq-wg77-h3fv, MINI-p4wh-c3qc-4xqh, MINI-p4xj-wvrc-6m5x, MINI-p557-j57c-xh88, MINI-p6h7-qg9v-gc67, MINI-p6j8-cg56-xpjf, MINI-p7cw-5phw-v233, MINI-p7qf-3hp8-489r, MINI-p839-3h9h-cm3c, MINI-p8c7-fr8h-qq67, MINI-p8p9-c58r-3m9h, MINI-p9cc-grw4-crh9, MINI-p9cg-58h7-cxg4, MINI-p9hc-787j-vcgm, MINI-pc46-7427-6jrh, MINI-pf26-46vq-xpg4, MINI-pf69-4p6v-7gvj, MINI-pgfp-257h-fc89, MINI-ph5w-5835-873r, MINI-ph68-2hh8-9xgx, MINI-phqc-7v7p-26vx, MINI-pjg2-jw2c-jc2p, MINI-pm4j-7374-33fh, MINI-pmrq-hm34-wrmx, MINI-ppqw-jvh8-4vq3, MINI-pqhq-3jj2-24m4, MINI-prx4-3rc6-58v7, MINI-pv4j-gc93-rrp5, MINI-pv8q-r97r-7hcf, MINI-pv8w-rv5r-85h4, MINI-pw3w-j7wr-8qvg, MINI-pwcg-7pw3-73pr, MINI-pwhv-33m6-gh3c, MINI-px28-2m5w-h9wc, MINI-px98-vcw6-7jxm, MINI-pxgg-fmj8-g5mj, MINI-q2c5-cj3h-qv3m, MINI-q2g7-fprm-xrmj, MINI-q38r-7hmr-q9hw, MINI-q43p-239w-q96x, MINI-q488-5xx3-7ffg, MINI-q4rp-8gw9-j35c, MINI-q4rx-2w6j-jrgr, MINI-q539-2p48-2396, MINI-q55q-ww3p-9223, MINI-q56r-cp3c-9rch, MINI-q953-4g3j-qr6g, MINI-q957-rcqj-279c, MINI-qc4f-4xmj-xr6f, MINI-qc65-f65q-m6xr, MINI-qc74-m42v-34mh, MINI-qf34-cfrc-g6gw, MINI-qf77-p5px-48mw, MINI-qfqm-c83r-2g77, MINI-qh2c-w659-m69q, MINI-qh58-jvqc-jwjc, MINI-qh5h-p2m8-cmjx, MINI-qh5p-6xhh-w822, MINI-qhv9-p84q-xvcx, MINI-qj87-vch6-3jxw, MINI-qj8g-796h-6jfw, MINI-qm52-pf83-vwj6, MINI-qm8c-7qhc-cmc3, MINI-qm9x-frgw-mjgq, MINI-qphv-48pc-w94p, MINI-qpp2-fq82-638j, MINI-qpqx-cp5x-8q6x, MINI-qq85-6q6x-6wvv, MINI-qrpq-42hw-jpxp, MINI-qv3f-r539-h35x, MINI-qv4j-x4g7-pv8g, MINI-qvp6-2rcf-r8h7, MINI-qwq2-c442-xv7c, MINI-qwqx-p3x2-7rgp, MINI-qx5j-rpwp-h4qj, MINI-qxg3-887g-qch5, MINI-qxpp-8xqp-7vc7, MINI-qxxf-wg44-qc43, MINI-r27q-cwpp-gjg5, MINI-r2g7-7phh-q357, MINI-r2wj-2fr6-9v9g, MINI-r333-3g6r-7vmf, MINI-r38j-gq5f-p63r, MINI-r3fp-q95c-6xq4, MINI-r3g8-f7mp-462r, MINI-r3qv-pwv8-6m92, MINI-r45r-pfxg-5564, MINI-r4m2-m5wg-7h89, MINI-r562-38wh-jvh6, MINI-r6pm-27x5-jw75, MINI-r777-gvjg-h3j6, MINI-r779-gp2w-xqh3, MINI-r92w-jw9x-5794, MINI-r9ww-6xmp-vmvh, MINI-rcvg-4mvg-2mgj, MINI-rcvv-w5xm-2m35, MINI-rcx2-hxw8-78vv, MINI-rg2m-mjq6-pxxq, MINI-rg92-j4rm-fg6v, MINI-rghr-ccrf-6w77, MINI-rgvx-r2ww-j72r, MINI-rgxx-cp6j-q2wx, MINI-rjfc-4c4g-qfq4, MINI-rm37-7x39-qq3f, MINI-rmg3-m88w-f5gj, MINI-rmjm-fgx8-2qmv, MINI-rp6v-jh84-q5v3, MINI-rph4-85q9-fcvg, MINI-rq6p-9rjg-qxh5, MINI-rqc2-327v-fg7m, MINI-rr95-c9x9-gfjg, MINI-rrh3-7vpc-rhvm, MINI-rvg8-268p-73pv, MINI-rvpx-7wqm-x38h, MINI-rw67-hxv3-xq8h, MINI-rw9r-pcwh-pfxr, MINI-rwpg-585r-f3rp, MINI-rxp9-77h5-8mc4, MINI-rxrq-wjh9-p6wc, MINI-v362-m7pm-c3ph, MINI-v44m-gmjf-mvg3, MINI-v4fv-3r94-g4mp, MINI-v582-pvmh-w92f, MINI-v5ff-wjgg-3c9j, MINI-v5g6-fh8r-f7fr, MINI-v662-3hvq-3rvw, MINI-v87q-7456-2qr6, MINI-v8g9-mh2x-mghx, MINI-v8gx-78r9-r54v, MINI-v8hw-2p69-hm58, MINI-v8pf-653f-4w8x, MINI-v95j-5v3j-7j7w, MINI-v9wg-8vqc-jrqj, MINI-vf5w-m7xc-24cv, MINI-vfmh-qgx9-9589, MINI-vg5r-jxq8-mgcj, MINI-vg65-57qw-9m64, MINI-vm63-974g-qp6p, MINI-vqhc-86gp-6379, MINI-vr5h-xv3q-9fhf, MINI-vr76-hf5m-cw85, MINI-vr76-w9x2-69j7, MINI-vrp9-6334-pr4r, MINI-vv8v-4xmx-xh4c, MINI-vw8c-3gqf-7gq8, MINI-vxh9-8x4p-75ch, MINI-w23p-277h-wcrh, MINI-w37p-6vrr-g6xg, MINI-w39g-xm3r-q9q3, MINI-w3g3-7p3v-7chc, MINI-w3gj-hqqm-cfmp, MINI-w3m8-xh27-g8hg, MINI-w496-h8x2-r9qr, MINI-w4jh-rrr7-774v, MINI-w57r-xhh8-hh7m, MINI-w667-r3qv-frjv, MINI-w6jj-6cpf-xxmf, MINI-w6v3-v2q4-g5pr, MINI-w72m-3r82-6r9r, MINI-w7xx-4q4c-8q4h, MINI-w9h3-6p8q-mrmv, MINI-w9mv-q89x-3rjx, MINI-w9pr-j5r3-7p9h, MINI-w9qc-h2v4-2mvp, MINI-wc99-8wrj-979v, MINI-wcw2-68vh-f869, MINI-wfj7-grr2-4gj9, MINI-wfw5-4v7g-hcxf, MINI-wgjf-w7mh-x9rh, MINI-wh5m-hpq4-h2rr, MINI-wh67-2c55-hvgg, MINI-wj8m-45c7-78j6, MINI-wjfv-x9m4-cxh6, MINI-wmcw-2868-h5cq, MINI-wqf6-q248-482q, MINI-wvj5-w2wr-hrh9, MINI-ww5g-2q6q-x92v, MINI-wwhr-hjxw-3ph2, MINI-wx3p-4vc3-3g6c, MINI-wxj5-483c-pgq7, MINI-x2qc-xj99-rq35, MINI-x3hp-jrpp-4xrc, MINI-x48c-77qx-q972, MINI-x4c6-qxrv-v26w, MINI-x4h7-pgf2-jvgm, MINI-x563-3wrm-4hwr, MINI-x57v-hf4f-gjcg, MINI-x5xf-6gjr-fjcp, MINI-x662-r9g2-gmg3, MINI-x69m-p354-g3wq, MINI-x7g8-gmvj-g8h7, MINI-x876-qr7g-jf28, MINI-x87j-qr73-px79, MINI-x8rm-f4mj-89fc, MINI-x9cq-jr5w-v5q4, MINI-x9q2-xjc8-3592, MINI-x9v4-73wp-w5hf, MINI-xc23-rc9r-747v, MINI-xcqq-mj4p-p5rq, MINI-xf78-73p3-q56r, MINI-xf92-9q2h-4w67, MINI-xgr7-m43f-wpvf, MINI-xh4v-p9pj-v98h, MINI-xh5h-7pq4-5w8v, MINI-xh5m-vg98-2vxg, MINI-xjfw-fq5h-9x26, MINI-xjj5-q49x-p6xw, MINI-xjx4-p7m2-jphg, MINI-xjxg-3p8j-q9ff, MINI-xmqh-x6j7-x3h6, MINI-xpch-fpw9-vxfx, MINI-xpcx-899w-f8mv, MINI-xq5f-wm2v-rpf7, MINI-xqcp-99gq-59mv, MINI-xqwf-crxv-24mw, MINI-xr5p-mrrg-q5v2, MINI-xr7j-2532-r2rw, MINI-xrvv-m853-wgpr, MINI-xw8x-g2cg-pgj8, MINI-xwxj-hrqx-9fxg, MINI-xx48-3r54-c5jw, MINI-xxrw-xf2r-6q98, UBUNTU-CVE-2026-39819

## What is CVE-2026-39819?

CVE-2026-39819 is a medium-severity path traversal vulnerability in Golang Go, published on 7 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The "go bug" command writes to two files with predictable names in the system temporary directory (for example, "/tmp"). An attacker with access to the temporary directory can create a symlink in one of these names, causing "go bug" to overwrite the target of the symlink.

Weakness: CWE-59 (Improper Link Resolution Before File Access)

## Which versions are affected by CVE-2026-39819?

2 open source packages ship an affected version, including golang and toolchain. It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `golang` | Bitnami | All versions | 1.25.10, 1.26.3 |
| `toolchain` | Go | All versions | 1.25.10, 1.26.3 |

Products: Golang Go.

## How do I fix CVE-2026-39819?

Upgrade golang to a fixed version for your release line: 1.25.10 or 1.26.3.

## Is CVE-2026-39819 being exploited?

There is no known exploitation of CVE-2026-39819 in the wild and no public exploit code.

## Other vulnerabilities in Golang Go

- [CVE-2020-0601](https://insights.sbomify.com/CVE-2020-0601/): Microsoft Windows CryptoAPI Spoofing (high 8.1, exploited in the wild)
- [CVE-2026-27143](https://insights.sbomify.com/CVE-2026-27143/): Missing bound checks can lead to memory corruption in safe Go in cmd/compile (critical 9.8)
- [CVE-2024-24790](https://insights.sbomify.com/CVE-2024-24790/): Unexpected behavior from Is methods for IPv4-mapped IPv6 addresses in net/netip (critical 9.8)
- [CVE-2023-39320](https://insights.sbomify.com/CVE-2023-39320/): Arbitrary code execution via go.mod toolchain directive in cmd/go (critical 9.8)
- [CVE-2023-24540](https://insights.sbomify.com/CVE-2023-24540/): Improper handling of JavaScript whitespace in html/template (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-39819 and fix it if it is affected.

What it is: CVE-2026-39819 is a medium-severity path traversal vulnerability in Golang Go, published on 7 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-39819 in the wild and no public exploit code.

Affected packages and fixed versions:
- golang (Bitnami): affected all versions; fixed in 1.25.10, 1.26.3
- toolchain (Go): affected all versions; fixed in 1.25.10, 1.26.3

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-2026-39819/ (Markdown: https://insights.sbomify.com/CVE-2026-39819/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-39819
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-39819
- OSV: https://osv.dev/vulnerability/CVE-2026-39819

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-39819/
Summaries are generated and may contain mistakes; the official description above is the record.