CVE-2026-3136 Google Cloud Build Comment Control Bypass
A remote attacker can execute arbitrary code in the build environment due to improper authorization in GitHub Trigger Comment Control.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-3136?
CVE-2026-3136 is a high-severity missing authorization vulnerability in Google Cloud Cloud Build, published on 3 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Weakness: CWE-863
Which versions are affected by CVE-2026-3136?
It affects 1 product.
Products include Google Cloud Build.
How do I fix CVE-2026-3136?
No fix has been published for CVE-2026-3136 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-3136 being exploited?
There is no known exploitation of CVE-2026-3136 in the wild and no public exploit code.
Sources
Also known as GHSA-p8rp-xfq6-8f8m.