CVE-2026-3136: Google Cloud Build

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

An improper authorization vulnerability in GitHub Trigger Comment Control in Google Cloud Build prior to 2026-1-26 allows a remote attacker to execute arbitrary code in the build environment. This vulnerability was patched on 26 January 2026, and no customer action is needed.

Affected products

• Google Cloud Build: before 2026-1-26 (fixed in 2026-1-26)

Published 2026-03-03. Last modified 2026-06-17.