CVE-2026-56864EPSS p20.4%
CVE-2026-56864CVE-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
Scoring
| CVSS | 7.5 () |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
| EPSS | 0.30% probability of exploitation · percentile 20.4% · 2026-10-05T12:00:23Z |
| Last modified | 2026-09-03 |