GO-2026-6602
Checksum database bypass for golang.org/toolchain in cmd/go
At a glance
- Published
- Updated
- CVE
- CVE-2026-94447
- Aliases
- BIT-golang-2026-94447
Description
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.
Affected packages
| Package | Versions |
|---|---|
| Go · toolchain | introduced 0, fixed 1.26.9, introduced 1.27.0-0, fixed 1.27.2 |
References
- https://go.dev/cl/840785 FIX
- https://go.dev/issue/81834 REPORT
- https://groups.google.com/g/golang-announce/c/U2fTuyDJznI WEB
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — Go Vulnerability Database |