{"id":"CVE-2026-94444","title":"Previously, a user operating inside of a malicious Go project that defines a bogus golang.org/fips140 and operates a malicious GOMODPROXY the user chooses to connect to can serve an arbitrary module in its place","summary":"Previously, a user operating inside of a malicious Go project that defines a bogus golang.org/fips140 and operates a malicious GOMODPROXY the user chooses to connect to can serve an arbitrary module in its place. We now unpack the truste…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-354"],"vendor":"toolchain","product":"toolchain","affected":["toolchain >= 1.27.0-0, < 1.27.2"],"patched":["toolchain 1.27.2"],"published":"2026-10-08","updated":"2026-10-15","sourceUpdated":"2026-10-15T16:18:24.000","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-94444","references":[{"url":"https://go.dev/cl/840685","label":"security@golang.org"},{"url":"https://go.dev/issue/81833","label":"security@golang.org"},{"url":"https://groups.google.com/g/golang-announce/c/U2fTuyDJznI","label":"security@golang.org"},{"url":"https://pkg.go.dev/vuln/GO-2026-6601","label":"security@golang.org"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94444.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-94444"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2548343"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-94444"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-94444"},{"url":"https://access.redhat.com/errata/RHSA-2026:79720"},{"url":"https://access.redhat.com/errata/RHSA-2026:79715"},{"url":"https://access.redhat.com/errata/RHSA-2026:87040"},{"url":"https://access.redhat.com/errata/RHSA-2026:86093"},{"url":"https://access.redhat.com/errata/RHSA-2026:86203"},{"url":"https://access.redhat.com/errata/RHSA-2026:87246"},{"url":"https://access.redhat.com/errata/RHSA-2026:87041"},{"url":"https://access.redhat.com/errata/RHSA-2026:87042"},{"url":"https://access.redhat.com/errata/RHSA-2026:87043"},{"url":"https://access.redhat.com/errata/RHSA-2026:86196"},{"url":"https://access.redhat.com/errata/RHSA-2026:87245"}],"tags":["nvd","osv","go","csaf","vex","red-hat","cve.org"],"epss":0.00097,"epssPercentile":0.00729,"aliases":["GO-2026-6601","BIT-golang-2026-94444"],"ecosystem":"go","ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T15:33:33.270418Z"},"scores":{"nvd":7.8,"vendor":6.7,"adp":7.8},"ingestedAt":"2026-10-09T00:19:50.978Z","slug":"CVE-2026-94444","body":"## Overview\n\nPreviously, a user operating inside of a malicious Go project that defines a bogus golang.org/fips140 and operates a malicious GOMODPROXY the user chooses to connect to can serve an arbitrary module in its place. We now unpack the trusted ziphash for the bundled golang.org/fips140 module and construct its entry in the GOMODCACHE such that it can be verified by the toolchain.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-94444)\n\nAffected packages:\n\n- `toolchain >= 1.27.0-0, < 1.27.2`\n\nPatched in:\n\n- `toolchain 1.27.2`\n\nSource: https://osv.dev/vulnerability/GO-2026-6601\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Exploit Intelligence, Migration Toolkit for Applications 8, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat Hardened Images, … · no fix planned: Exploit Intelligence, Red Hat Hardened Images, Migration Toolkit for Applications 8, Red Hat Enterprise Linux 10, … · updated 2026-10-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-94444.json)\n- **RHSA-2026:79720** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:79720)\n- **RHSA-2026:79715** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:79715)\n- **RHSA-2026:87040** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0) · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:87040)\n- **RHSA-2026:86093** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86093)\n- **RHSA-2026:86203** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86203)\n- **RHSA-2026:87246** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6) · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:87246)\n- **RHSA-2026:87041** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.2) · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:87041)\n- **RHSA-2026:87042** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.9.4) · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:87042)\n- **RHSA-2026:87043** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6) · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:87043)\n- **RHSA-2026:86196** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-10-20 · [advisory](https://access.redhat.com/errata/RHSA-2026:86196)\n- **RHSA-2026:87245** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream TUS (v.8.8) · released 2026-10-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:87245)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":222589,"id":"CVE-2026-94444","ts":1792084772299,"field":"cvss","old":"6.7","new":"7.8"},{"seq":222588,"id":"CVE-2026-94444","ts":1792084772299,"field":"severity","old":"medium","new":"high"},{"seq":218434,"id":"CVE-2026-94444","ts":1791533729036,"field":"cvss","old":null,"new":"6.7"},{"seq":218433,"id":"CVE-2026-94444","ts":1791533729036,"field":"severity","old":"none","new":"medium"}]}