CVE-2024-27088
NONECVE-2024-27088 is a none-severity (CVSS 0) Uncontrolled Resource Consumption vulnerability in es5-ext. O3 Security confirms whether CVE-2024-27088 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
es5-ext Regular Expression Denial of Service in `function#copy` and `function#toStringTokens`
Blast Radius
Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.
es5-extnpmDescription
es5-ext contains ECMAScript 5 extensions. Passing functions with very long names or complex default argument names into function#copy or function#toStringTokens may cause the script to stall. The vulnerability is patched in v0.10.63.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | es5-ext | ≥ 0.10.0&&< 0.10.63 | 0.10.63 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for es5-ext. 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 es5-ext to 0.10.63 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-27088 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 CVE-2024-27088 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 CVE-2024-27088. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is CVE-2024-27088 in your dependencies?
O3 detects CVE-2024-27088 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.