CVE-2025-55164
content-security-policy-parser Prototype Pollution Vulnerability May Lead to RCE
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 4.0 · 8.8 High
EPSS < 1%
KEV · Not listed
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