No exploitation reportedFix available

CVE-2026-94444

Q: Is CVE-2026-94444 actively exploited?

Active exploitation of CVE-2026-94444 has not been confirmed. Its EPSS score was 0.09% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2026-94444?

CVE-2026-94444 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Checksum bypass for golang.org/fips140 in cmd/go

No exploitation reported by the sources we read.

Published2026-10-08
Fixed in1.26.9
WeaknessCWE-354

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC

2026-10-0823:17CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-94444?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-94444?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV

golang

Branch	Affected	Fixed in	Source
1.26	< 1.26.9	1.26.9	OSV

toolchain

Branch	Affected	Fixed in	Source
1.26	< 1.26.9	1.26.9	OSV

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

CVE-2026-94444 Red Hat Product Security217 products fixed · 9 known affected
cmd/go: golang: cmd/go: arbitrary code execution via untrusted module proxy
exploit-intelligence/vulnerability-analysis-rhel9 as a component of Exploit Intelligence · mta/mta-go-external-provider-rhel9 as a component of Migration Toolkit for Applications 8 · ubi10/go-toolset as a component of Red Hat Enterprise Linux 10 · +6 more
RHSA-2026:87043 Red Hat Product Security21 products fixed
Red Hat Security Advisory: golang security, bug fix, and enhancement update
RHSA-2026:87042 Red Hat Product Security21 products fixed
Red Hat Security Advisory: golang security, bug fix, and enhancement update
RHSA-2026:87041 Red Hat Product Security21 products fixed
Red Hat Security Advisory: golang security, bug fix, and enhancement update
RHSA-2026:87040 Red Hat Product Security21 products fixed
Red Hat Security Advisory: golang security, bug fix, and enhancement update
RHSA-2026:86196 Red Hat Product Security21 products fixed
Red Hat Security Advisory: golang security, bug fix, and enhancement update

4 more advisories

Full record on NVD

Fix

Update golang to 1.26.9
Vendor fix Red Hat Product Security RHSA-2026:87043 · 21 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Vendor fix Red Hat Product Security RHSA-2026:79720 · 17 productsFor details on how to apply this update, which includes the changes described in this advisory, refer to: https://images.redhat.com/
Workaround from the vendor Red Hat Product Security RHSA-2026:87043 · 21 productsDo not point GOPROXY or related module proxy settings at untrusted proxies, and do not build untrusted Go projects while using a non-default proxy. Prefer the default Go module proxy and checksum database.

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionnone2026-10-15
OpenCVESSVC decisionnone—
CISA-ADPCVSS 3.17.82026-10-15
CISA-ADPweakness (CWE)CWE-3542026-10-15
FIRST EPSSEPSS score0.09 %2026-10-22
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2026-10-08
Last Modified: 2026-10-15
NVD status: Awaiting Analysis

Frequently asked questions

What is CVE-2026-94444?

Is CVE-2026-94444 actively exploited?

Active exploitation of CVE-2026-94444 has not been confirmed. Its EPSS score was 0.09% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-94444?

CVE-2026-94444 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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