GHSA-273r-rm8g-7f3x
HIGHGHSA-273r-rm8g-7f3x is a high-severity (CVSS 7.5) CWE-754 vulnerability in mercurius. O3 Security confirms whether GHSA-273r-rm8g-7f3x is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Uncaught Exception in mercurius
Blast Radius
Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.
mercuriusnpmDescription
Impact
Any users from [email protected] to 8.11.1 are subjected to a denial of service attack by sending a malformed JSON to /graphql unless they are using a custom error handler.
Patches
The vulnerability has been fixed in https://github.com/mercurius-js/mercurius/pull/678 and shipped as v8.11.2.
Workarounds
Use a custom error handler.
References
See https://github.com/mercurius-js/mercurius/issues/677
For more information
If you have any questions or comments about this advisory:
- Open an issue in https://github.com/mercurius-js/mercurius
- Email us at [email protected]
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | mercurius | ≥ 8.10.0&&< 8.11.2 | 8.11.2 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for mercurius. 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 mercurius to 8.11.2 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-273r-rm8g-7f3x 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-273r-rm8g-7f3x 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-273r-rm8g-7f3x. 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-273r-rm8g-7f3x in your dependencies?
O3 detects GHSA-273r-rm8g-7f3x across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.