VULNERABILITY INTELLIGENCE

CVE-2026-56864

CVSS score7.5 HIGH
EPSS probability0.30%
CISA KEVNot currently listed
Published2026-08-13
Last modified2026-09-03
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

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

Weakness classification

  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-347

Primary references