CVE intelligence and bounded remediation

CVE-2024-36120 — javascript-deobfuscator removes common JavaScript obfuscation techniques

High CVSS 8.1

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.

Severity
High
CVSS
8.1 (3.1)
Published
2024-05-31
CISA KEV
Not currently listed
Ecosystem
javascript/npm
Weaknesses
CWE-94

Affected products

  • deobfuscate / javascript_deobfuscator

Matched remediation archetype

Command, code, expression, and template injection

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Check exposure

  • Trace untrusted values to process execution, interpreters, evaluators, template engines, dynamic imports, and administrative scripting features.
  • Determine whether the affected path is reachable across each trust boundary and which service account or host privilege it inherits.
  • Review configuration for optional execution features, unsafe compatibility modes, and shell invocation.

Remediate safely

  • Replace string-built commands or evaluated code with fixed operations and structured argument APIs that do not invoke a shell.
  • Use strict allowlists for operation identifiers and reject unexpected input before it reaches any interpreter.
  • Update the affected component and add inert regression tests covering metacharacters, encoding variants, and alternate request paths.

Authoritative sources

Complete CVE record and remediation plan

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