GitHub Advisoryadvisory · npm
GHSA-w3rx-r6r6-pgpr image-size: ICNS parser allows denial of service through an infinite loop
HIGH
Official page ↗
- Aliases
- CVE-2025-71330
- Ecosystem
- npm
- Packages
- image-size
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-835
- Reviewed
- 2026-08-07
Affected packages
• npm image-size: >= 0.6.3, < 2.0.3 → fixed in 2.0.3
Description
image-size through 2.0.2 contains a denial of service vulnerability that allows remote attackers to permanently block the Node.js event loop by supplying a specially crafted ICNS image buffer. Attackers can craft an ICNS buffer containing valid magic bytes and a zero-valued entry length field to trigger an infinite loop in the ICNS parser, as the offset is never incremented when the entry length field is 0, causing the while loop condition to remain true indefinitely.
Related
Alias · CVE (1)
- CVE-2025-71330 image-size through 2.0.2 contains a denial of service vulnerability that allows remote attackers to permanently block the Node.js event… vulnerability
Weakness · CWE (1)
- CWE-835 Loop with Unreachable Exit Condition weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-71330 advisory
- https://codeberg.org/image-size/image-size/commit/e6e83a5578961de81f6d5834d90fb7430d8f29a5 web
- https://github.com/image-size/image-size package
- https://joshua.hu/image-size-infinite-loop-dos-vulnerabilities web
- https://web.archive.org/web/20260224152152/https://github.com/image-size/image-size/pull/439 web
- https://www.vulncheck.com/advisories/image-size-denial-of-service-via-malformed-icns-image-parsing web