CVE-2025-71329
image-size 2.0.2 Denial of Service via Infinite Loop in JXL/HEIF Parser
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| image-size image-size image-size
npm |
≥ 1.1.0; ≤ 1.2.1 (affected, semver) ≥ 2.0.0; ≤ 2.0.2 (affected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 8.7 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: VulnCheck |
Exploit evidence
- https://joshua.hu/image-size-infinite-loop-dos-vulnerabilities
exploit · CNA: VulnCheck
References
- https://joshua.hu/image-size-infinite-loop-dos-vulnerabilitiesCNA: VulnCheck · technical-description, exploit
- https://web.archive.org/web/20260224152152/https://github.com/image-size/image-size/pull/439CNA: VulnCheck · issue-tracking, patch
- https://www.vulncheck.com/advisories/image-size-denial-of-service-via-infinite-loop-in-jxl-heif-parserCNA: VulnCheck · third-party-advisory
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