GHSA-c8v6-786g-vjx6
Fix: nov/json-jwt@593ea8bGHSA-c8v6-786g-vjx6 is a CWE-284 vulnerability in json-jwt. O3 Security confirms whether GHSA-c8v6-786g-vjx6 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
json-jwt allows bypass of identity checks via a sign/encryption confusion attack
Real-World Exposure
json-jwt💎json-jwtReal-time download stats are indexed for npm and PyPI packages. This vulnerability affects RubyGems packages — download data is not available via public APIs for these ecosystems.
Description
The json-jwt (aka JSON::JWT) gem 1.16.x before 1.16.6, 1.15.x before 1.15.3.1 for Ruby sometimes allows bypass of identity checks via a sign/encryption confusion attack. For example, JWE can sometimes be used to bypass JSON::JWT.decode.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 💎RubyGems | json-jwt | ≥ 1.16.0&&< 1.16.6 | 1.16.6 |
| 💎RubyGems | json-jwt | all versions | 1.15.3.1 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for json-jwt. 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 json-jwt to 1.16.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-c8v6-786g-vjx6 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-c8v6-786g-vjx6 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-c8v6-786g-vjx6. 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-c8v6-786g-vjx6 in your dependencies?
O3 detects GHSA-c8v6-786g-vjx6 across RubyGems dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.