Unknown severity · Source severity not reportedCVE-2026-94444

Checksum bypass for golang.org/fips140 in cmd/goCVE-2026-94444

Answer in brief

CVE-2026-94444 records a Unknown severity vulnerability in Checksum bypass for golang.org/fips140 in cmd/go. The current sources do not mark it as known exploited. The current feed maps Go toolchain/cmd/go (generic), toolchain (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 8, 2026Updated Oct 8, 2026Source checked Oct 9, 2026First seen by HOL Oct 8, 2026Material review Oct 8, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Go toolchain/cmd/go (generic), toolchain (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Go toolchain/cmd/gogeneric	>=0 <1.26.9 \|\| >=1.27.0-0 <1.27.2	1.26.9, 1.27.2
toolchaingo	>=0 <1.26.9 >=1.27.0-0 <1.27.2	1.26.9, 1.27.2

Recommended response

Check inventory. Check lockfiles and deployed manifests for Go toolchain/cmd/go, toolchain.
Review the reported fix. Update Go toolchain/cmd/go to 1.26.9; toolchain to 1.26.9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 8, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 8, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.