What’s Vulnerable › Vulnerabilities

CVE-2025-71329: image-size 2.0.2 Denial of Service via Infinite Loop in JXL/HEIF Parser

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-06-10 · updated 2026-10-12
• Weakness: CWE-835

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 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: from 1.1.0 through 1.2.1; from 2.0.0 through 2.0.2

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-infinite-loop-in-jxl-heif-parser

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