GHSA-739f-hw6h-7wq8
HIGHGHSA-739f-hw6h-7wq8 is a high-severity (CVSS 7.1) CWE-347 vulnerability in github.com/sigstore/policy-controller. O3 Security confirms whether GHSA-739f-hw6h-7wq8 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
PolicyController before 0.2.1 may bypass attestation verification
Blast Radius
github.com/sigstore/policy-controllerReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Go packages — download data is not available via public APIs for these ecosystems.
Description
PolicyController will report a false positive, resulting in an admission when it should not be admitted when:
- There is at least one attestation with a valid signature
- There are NO attestations of the type being verified (--type defaults to "custom")
Users should upgrade to cosign version 0.2.1 or greater for a patch. There are no known workarounds at this time.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐹Go | github.com/sigstore/policy-controller | all versions | 0.2.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for github.com/sigstore/policy-controller. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update github.com/sigstore/policy-controller to 0.2.1 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-739f-hw6h-7wq8 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-739f-hw6h-7wq8 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-739f-hw6h-7wq8. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-739f-hw6h-7wq8 in your dependencies?
O3 detects GHSA-739f-hw6h-7wq8 across Go dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.