--- 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' --- ## Overview 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 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. ## Remediation Refer to the linked advisories for vendor-supplied fixes and affected version ranges. ## Package advisory (CVE-2026-94444) Affected packages: - `toolchain >= 1.27.0-0, < 1.27.2` Patched in: - `toolchain 1.27.2` Source: https://osv.dev/vulnerability/GO-2026-6601 ## Vendor advisories - **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) - **RHSA-2026:79720** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:79720) - **RHSA-2026:79715** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:79715) - **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) - **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) - **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) - **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) - **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) - **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) - **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) - **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) - **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)