GHSA-q8j6-pwqx-pm96
HIGHGHSA-q8j6-pwqx-pm96 is a high-severity (CVSS 8) Information Exposure vulnerability in squirrelly. 4 public exploit references exist, so weaponization risk is real. O3 Security confirms whether GHSA-q8j6-pwqx-pm96 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
Insecure template handling in Squirrelly
Blast Radius
Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.
squirrellynpmDescription
Squirrelly is a template engine implemented in JavaScript that works out of the box with ExpressJS. Squirrelly mixes pure template data with engine configuration options through the Express render API. By overwriting internal configuration options remote code execution may be triggered in downstream applications. Version 9.0.0 has a fix for this issue. For complete details refer to the referenced GHSL-2021-023.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | squirrelly | all versions | 9.0.0 |
Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.
Squirrelly is a template engine implemented in JavaScript that works out…
Squirrelly is a template engine implemented in JavaScript that works out…
Squirrelly is a template engine implemented in JavaScript that works out…
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for squirrelly. 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 squirrelly to 9.0.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-q8j6-pwqx-pm96 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-q8j6-pwqx-pm96 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-q8j6-pwqx-pm96. 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-q8j6-pwqx-pm96 in your dependencies?
O3 detects GHSA-q8j6-pwqx-pm96 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.