This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-56864 →
DEBIAN-CVE-2026-56864
A malicious GOSUMDB was capable of serving arbitrary module content not contained within the transparency log. This attack allows for a coordinating G...
Original description
The description as published by the source.
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: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
golang-1.19
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
golang-1.24
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
golang-1.26
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.26.6-1"}]}]
Debian:14
golang-1.27
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.27~rc3-1"}]}]
References
- advisory security-tracker.debian.org