CVE-2024-36120: javascript-deobfuscator crafted payload can lead to code execution

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-05-31 · updated 2026-06-17
Weakness: CWE-94

Description

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 products

ben-sb javascript-deobfuscator: before 1.1.0 — fixed in 1.1.0

How to fix

Upgrade to a fixed version: ben-sb javascript-deobfuscator 1.1.0. Check the vendor advisory for mitigations.

References

https://github.com/ben-sb/javascript-deobfuscator/commit/630d3caec83d5f31c5f7a07e6fadf613d06699d6
https://github.com/ben-sb/javascript-deobfuscator/security/advisories/GHSA-9p6p-8v9r-8c9m
https://github.com/ben-sb/javascript-deobfuscator/commit/630d3caec83d5f31c5f7a07e6fadf613d06699d6
https://github.com/ben-sb/javascript-deobfuscator/security/advisories/GHSA-9p6p-8v9r-8c9m

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