GHSA-4rr6-gf59-ggw5 — namshi/jose
GHSA-4rr6-gf59-ggw5 is a security vulnerability in namshi/jose. A fix is available for namshi/jose — see the affected versions and patch details below.
namshi/jose - Verification bypass
Real-World Exposure
namshi/joseReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects Packagist packages — download data is not available via public APIs for these ecosystems.
Description
Several widely-used JSON Web Token (JWT) libraries, including node-jsonwebtoken, pyjwt, namshi/jose, php-jwt, and jsjwt, are affected by critical vulnerabilities that could allow attackers to bypass the verification step when using asymmetric keys (RS256, RS384, RS512, ES256, ES384, ES512).
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 🐘Packagist | namshi/jose | all versions | 2.2.0composer require namshi/jose:^2.2.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for namshi/jose, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update namshi/jose to 2.2.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-4rr6-gf59-ggw5 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 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-4rr6-gf59-ggw5 can be triaged on real exposure rather than presence alone.
Tailored to GHSA-4rr6-gf59-ggw5. 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-4rr6-gf59-ggw5 in your dependencies?
O3 Security finds GHSA-4rr6-gf59-ggw5 across Packagist dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.