CVE-2024-36120
HIGHCVE-2024-36120 is a high-severity (CVSS 8.1) Code Injection vulnerability in js-deobfuscator. O3 Security confirms whether CVE-2024-36120 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
javascript-deobfuscator crafted payload can lead to code execution
Blast Radius
Weekly download volume for affected packages — a proxy for how broadly this vulnerability is deployed.
js-deobfuscatornpmDescription
javascript-deobfuscator removes common JavaScript obfuscation techniques. In affected versions crafted payloads targeting expression simplification can lead to code execution. This issue has been patched in version 1.1.0. Users are advised to update. Users unable to upgrade should disable the expression simplification feature.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | js-deobfuscator | all versions | 1.1.0 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for js-deobfuscator. 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 js-deobfuscator to 1.1.0 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2024-36120 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-2024-36120 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-2024-36120. 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-2024-36120 in your dependencies?
O3 detects CVE-2024-36120 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.