CVE-2026-3136
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedAn 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.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceImproper authorization vulnerability in GitHub Trigger Comment Control of Google Cloud Build allows remote attackers to bypass authorization checks and execute arbitrary code in the build environment. This is a pre-authentication flaw with critical severity (CVSS 9.8), enabling full compromise of build processes.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 2026-1-26CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm Google Cloud Build is in useIdentify any Cloud Build configurations, build triggers, or pipelines within your Google Cloud projectAffected if Google Cloud Build is actively used in the environment
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Identify GitHub Trigger Comment Control configurationReview Cloud Build trigger settings to determine if the GitHub comment-based trigger feature is enabledAffected if GitHub Trigger Comment Control feature is enabled on any build triggers
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Check Cloud Build service versionQuery the Cloud Build service metadata or check the build history timestamps to determine when builds were executedAffected if Builds were executed prior to January 26, 2026 while the feature was enabled
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Review Cloud Audit Logs for suspicious trigger activityExamine Cloud Audit Logs for build triggers activated by unexpected or unauthorized GitHub comments before the patch dateAffected if Log entries show build executions triggered by unfamiliar GitHub comments or unexpected sources
The environment is affected if Google Cloud Build is in use with the GitHub Trigger Comment Control feature enabled and any builds were executed before the January 26, 2026 patch date.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped2026-1-26
No customer action required; Google automatically patched this vulnerability server-side on January 26, 2026. Customers using Cloud Build need not take any remediation steps.
- No customer action required. Google has patched this vulnerability server-side as of 2026-01-26.
- If you are using Cloud Build GitHub Trigger Comment Control, the protection is now in place automatically.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation1.0 h
- Review / QA1.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-3136 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2026-3136 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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