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 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.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-25)

CWE

CWE-835

Published

2026-06-10

Modified

2026-10-12

Record from

the NVD, synced 2026-10-19

Affected

• image-size:image-size

Packages (OSV)

References

• https://joshua.hu/image-size-infinite-loop-dos-vulnerabilities
• https://web.archive.org/web/20260224152152/https://github.com/image-size/image-size/pull/439
• https://www.vulncheck.com/advisories/image-size-denial-of-service-via-malformed-icns-image-parsing

Check your stackJSON