CVE-2026-19410 PUBLISHED

Google Cloud Build Comment Control Bypass via Webhook Suppression

Assigner: GoogleCloud
Reserved: 10.08.2026 Published: 31.08.2026 Updated: 31.08.2026

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.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/U:Clear
CVSS Score: 9.4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	Low
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	Google Cloud
Product	Google Cloud Build
Versions	Default: unaffected affected from 0 to 2026-06-24 (excl.)

Credits

inspector-ambitious reporter

References

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

Problem Types

CWE-367 Time-of-check time-of-use (TOCTOU) race condition CWE
CWE-345 Insufficient Verification of Data Authenticity CWE

Impacts

CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs