CVE-2026-94447

UNKNOWN 0.0

Checksum database bypass for golang.org/toolchain in cmd/go

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

Previously, a user operating inside of a malicious Go project that defines a bogus golang.org/toolchain go.sum entry and operates a malicious GOMODPROXY the user chooses to use can bypass the intended checksum. We now ensure that golang.org/toolchain always goes to the network for the canonical checksum.

Vendor	go toolchain
Product	cmd/go
Published	Oct 8, 2026

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Affected Versions

Go toolchain / cmd/go

0 < 1.26.9 1.27.0-0 < 1.27.2

References

NVD ↗ CVE.org ↗ EPSS Data ↗

go.dev: https://go.dev/cl/840785 go.dev: https://go.dev/issue/81834 groups.google.com: https://groups.google.com/g/golang-announce/c/U2fTuyDJznI pkg.go.dev: https://pkg.go.dev/vuln/GO-2026-6602