Vulnerability · CVE-2026-94444
Checksum bypass for golang.org/fips140 in cmd/go
Published Oct 8, 2026 · catalog updated Oct 16, 2026 · Checksum bypass for golang.org/fips140
Check if you run it
No confirmed exploitation is on record for CVE-2026-94444. EPSS is 0.09%. Act only if a listed version of Checksum bypass for golang.org/fips140 is installed.
Gaps on this record
- The stored product name is a package slug. The name on this page is taken from the title (Checksum bypass for golang.org/fips140).
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
- Severity
- High7.8
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.09%
- Remediation
- Not established
- Affected products
- Go toolchain
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- Go toolchain0 → 1.26.9
How to fix CVE-2026-94444
Recommended remediation
No required-action text, fix commit, or clear fixed-version range is stored yet.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-94444. EPSS is 0.09%. Act only if a listed version of Checksum bypass for golang.org/fips140 is installed.
Which versions are affected?
Compare what you have installed with 0 → 1.26.9. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-354. EPSS 0.09%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Oct 8, 2026 · Catalog
Detected
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.
Oct 10, 2026 · Catalog
Fix available
Go toolchain 0 → 1.26.9
Oct 10, 2026 · Catalog
Updated
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.
Oct 15, 2026 · NIST NVD
Updated
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.
Oct 16, 2026 · Go Vulnerability Database
Fix available
toolchain fixed in 1.26.9
Oct 16, 2026 · Go Vulnerability Database
Fix available
toolchain fixed in 1.26.9
Oct 16, 2026 · Go Vulnerability Database
Updated
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.
Sources
- CVE.orgVulnerability recordCVE-2026-94444
Official CVE identifier
cve.org - FIRST EPSSExploitation probabilityCVE-2026-94444
30-day exploitation probability 0.1%
first.org - Go Vulnerability DatabasePackage advisoryGO-2026-6601
Checksum bypass for golang.org/fips140 in cmd/go
osv.dev - NIST NVDVulnerability recordCVE-2026-94444
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/fips14
nvd.nist.gov - OpenSSF OSV / OSV ScannerPackage advisoryGO-2026-6601
Checksum bypass for golang.org/fips140 in cmd/go
osv.dev
References
Freshness
Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.