CVE-2025-55164
CVE-2025-55164 · content-security-policy-parser Prototype Pollution Vulnerability May Lead to RCE
This page contains facts from public vulnerability sources. Check the original advisory before updating.
content-security-policy-parser parses content security policy directives. A prototype pollution vulnerability exists in versions 0.5.0 and earlier, wherein if a policy name is called __proto__, one can override the Object prototype. This issue has been patched in version 0.6.0. A workaround involves disabling prototype method in NodeJS, neutralizing all possible prototype pollution attacks. Provide either --disable-proto=delete (recommended) or --disable-proto=throw as an argument to node to enable this feature.
CVSS 8.8 · High · EPSS 0.5% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
content-security-policy-parser
- Versions
- < 0.6.0: Affected
No fix published
content-security-policy-parser npm
- Affected ranges
- SEMVER: < 0.6.0
Update to 0.6.0
Original sources
- https://github.com/helmetjs/content-security-policy-parser/security/advisories/GHSA-w2cq-g8g3-gm83
- https://github.com/helmetjs/content-security-policy-parser/issues/11
- https://github.com/helmetjs/content-security-policy-parser/commit/b13a52554f0168af393e3e38ed4a94e9e6aea9dc
- https://www.vicarius.io/vsociety/posts/cve-2025-55164-detect-node-csp-parser-vulnerability
- https://www.vicarius.io/vsociety/posts/cve-2025-55164-mitigate-csp-parser-vulnerability
- https://nvd.nist.gov/vuln/detail/CVE-2025-55164