| Name | CVE-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 |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1144340, 1144341, 1144342 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| golang-1.15 (PTS) | bullseye | 1.15.15-1~deb11u4 | vulnerable |
| golang-1.19 (PTS) | bookworm | 1.19.8-2 | vulnerable |
| golang-1.24 (PTS) | trixie | 1.24.4-1 | vulnerable |
| golang-1.25 (PTS) | forky, sid | 1.25.12-1 | vulnerable |
| golang-1.26 (PTS) | forky, sid | 1.26.5-1 | vulnerable |
| golang-1.27 (PTS) | forky, sid | 1.27~rc2-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| golang-1.15 | source | (unstable) | (unfixed) | |||
| golang-1.19 | source | (unstable) | (unfixed) | |||
| golang-1.24 | source | (unstable) | (unfixed) | |||
| golang-1.25 | source | (unstable) | (unfixed) | 1144342 | ||
| golang-1.26 | source | (unstable) | (unfixed) | 1144341 | ||
| golang-1.27 | source | (unstable) | (unfixed) | 1144340 |
[trixie] - golang-1.24 <no-dsa> (Minor issue)
https://github.com/golang/go/issues/80745
Fixed by: https://github.com/golang/go/commit/a3876703796b5d3db7a7c6f2193e8663399f2339 (go1.27rc3)
Fixed by: https://github.com/golang/go/commit/9f6980fd5c03840b0f6764e8ec7c705b90989eee (go1.26.6)
Fixed by: https://github.com/golang/go/commit/22e01669cdcabb9cfad02e0c2bffbce8198f6bfb (go1.25.13)