GHSA-4j6x-w426-6rc6
GHSA-4j6x-w426-6rc6 is a security vulnerability in @cubejs-backend/api-gateway. O3 Security confirms whether GHSA-4j6x-w426-6rc6 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Default Express middleware security check is ignored in production
Blast Radius
Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.
@cubejs-backend/api-gatewaynpmDescription
Default Express middleware security check is ignored in production
Impact
All Cube.js deployments that use affected versions of @cubejs-backend/api-gateway with default express authentication middleware in production environment are affected.
Patches
@cubejs-backend/[email protected]
Workarounds
Override default authentication express middleware: https://cube.dev/docs/@cubejs-backend-server-core#options-reference-check-auth-middleware
For more information
If you have any questions or comments about this advisory:
- Open an issue in https://github.com/cube-js/cube.js/issues
- Reach out us in community Slack: https://slack.cube.dev/
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | @cubejs-backend/api-gateway | ≥ 0.11.0&&< 0.11.17 | 0.11.17 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for @cubejs-backend/api-gateway. 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 @cubejs-backend/api-gateway to 0.11.17 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-4j6x-w426-6rc6 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-4j6x-w426-6rc6 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-4j6x-w426-6rc6. 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-4j6x-w426-6rc6 in your dependencies?
O3 detects GHSA-4j6x-w426-6rc6 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.