GHSA-f98m-q3hr-p5wq
CRITICALGHSA-f98m-q3hr-p5wq is a critical-severity (CVSS 9.8) CWE-1321 vulnerability in locutus. 2 public exploit references exist, so weaponization risk is real. O3 Security confirms whether GHSA-f98m-q3hr-p5wq is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Prototype Pollution in locutus
Blast Radius
Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.
locutusnpmDescription
All versions of package locutus prior to version 2.0.12 are vulnerable to Prototype Pollution via the php.strings.parse_str function.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | locutus | all versions | 2.0.12 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for locutus. 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 locutus to 2.0.12 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-f98m-q3hr-p5wq 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-f98m-q3hr-p5wq 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-f98m-q3hr-p5wq. 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-f98m-q3hr-p5wq in your dependencies?
O3 detects GHSA-f98m-q3hr-p5wq across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.