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CVE-2024-21891

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-02-20 · updated 2026-06-17
• Weakness: CWE-22

Description

Node.js depends on multiple built-in utility functions to normalize paths provided to node:fs functions, which can be overwitten with user-defined implementations leading to filesystem permission model bypass through path traversal attack. This vulnerability affects all users using the experimental permission model in Node.js 20 and Node.js 21. Please note that at the time this CVE was issued, the permission model is an experimental feature of Node.js.

Affected products

• Node.js: from 20.0.0 before 20.11.1; from 21.0.0 before 21.6.2 — fixed in 20.11.1, 21.6.2

How to fix

Upgrade to a fixed version: Node.js 20.11.1, 21.6.2. Check the vendor advisory for mitigations.

References

• http://www.openwall.com/lists/oss-security/2024/03/11/1
• https://hackerone.com/reports/2259914
• https://security.netapp.com/advisory/ntap-20240315-0005/
• http://www.openwall.com/lists/oss-security/2024/03/11/1
• https://hackerone.com/reports/2259914
• https://security.netapp.com/advisory/ntap-20240315-0005/

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