GO-2026-6180
Ignore unrelated, unauthenticated hashes in Lookup in golang.org/x/mod/sumdb
At a glance
- Published
- Updated
- CVE
- CVE-2026-56864
- Aliases
- BIT-golang-2026-56864
Description
A malicious GOSUMDB was capable of serving arbitrary module content not contained within the transparency log. This attack allows for a coordinating GOPROXY and GOSUMDB to serve a client malicious module content that cannot be detected by evaluating the transparency log. In order to determine if you have been affected: rm -r go.sum go.work.sum vendor/ && go mod tidy
Affected packages
| Package | Versions |
|---|---|
| Go · toolchain | introduced 0, fixed 1.25.13, introduced 1.26.0-0, fixed 1.26.6, introduced 1.27.0-0, fixed 1.27.0-rc.3 |
| Go · golang.org/x/mod | introduced 0, fixed 0.40.0 |
References
- https://go.dev/issue/80745 REPORT
- https://groups.google.com/g/golang-announce/c/94pEornpRlI WEB
- https://go.dev/cl/815000 FIX
- https://go.dev/cl/815020 FIX
Sources
| Source | Licence |
|---|---|
| OSV.dev | CC-BY 4.0 — Go Vulnerability Database |