CVE-2026-94444 Checksum bypass for golang.org/fips140 in cmd/go
Attackers can bypass checksum verification for the FIPS 140 module in the Go toolchain, allowing malicious code execution via a compromised module proxy.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-94444?
CVE-2026-94444 is a high-severity vulnerability in cmd/go, published on 8 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-354
Which versions are affected by CVE-2026-94444?
2 open source packages ship an affected version, including golang and toolchain.
| Package | Affected | Fixed in |
|---|---|---|
golang Bitnami | All versions | 1.26.9, 1.27.2 |
toolchain Go | All versions | 1.26.9, 1.27.2 |
How do I fix CVE-2026-94444?
Upgrade golang to a fixed version for your release line: 1.26.9 or 1.27.2.
Is CVE-2026-94444 being exploited?
There is no known exploitation of CVE-2026-94444 in the wild and no public exploit code.
Sources
Also known as AZL-107466, AZL-107481, BELL-CVE-2026-94444, BIT-golang-2026-94444, DEBIAN-CVE-2026-94444, GHSA-2f4j-3hgj-v9j7 and 2148 more.