CVE-2025-71329: Image-Size

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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 image buffer with a zero-valued size field in a recognized box-type. Attackers can trigger an infinite loop in the JXL or HEIF image parsers by providing a crafted image containing a box with a size of zero, causing the offset to never advance and permanently hanging the application.

Affected products

• Image-Size Image-Size: from 1.1.0, up to and including 1.2.1; from 2.0.0, up to and including 2.0.2

Published 2026-06-10. Last modified 2026-10-05.