CVE-2026-19410: Google Cloud Build Comment Control Bypass via Webhook Suppression

Severity: critical (CVSS 9.4 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-31 · updated 2026-08-31
Weakness: CWE-345

Description

An Incorrect Authorization vulnerability in GitHub Trigger Comment Control in Google Cloud Build prior to 2026-06-24 on Google Cloud Platform allows a remote attacker to execute unreviewed code in the build environment using webhook suppression. This vulnerability was patched on 24 June 2026, and no customer action is needed.

Affected products

Google Cloud Build: before 2026-06-24 — fixed in 2026-06-24

How to fix

Upgrade to a fixed version: Google Cloud Build 2026-06-24. Check the vendor advisory for mitigations.

References

https://docs.cloud.google.com/build/docs/release-notes#August_24_2026

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