CVE-2025-71319

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.

Affected

image-size

CVSS v4.0 VULNCHECK

8.7 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v4.0 GitHub

8.7 HIGHCVSS: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 v3.1 CNA

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

EPSS

0.73% chance of exploitation in the next 30 days, 53rd percentile

Published

2026-06-09

Updated

2026-09-03

Proof-of-concept exploits (2)

• https://joshua.hu/image-size-infinite-loop-dos-vulnerabilities
• advisories/GHSA-m5qc-5hw7-8vg7

Security advisories

• https://access.redhat.com/errata/RHSA-2026:33313
• https://access.redhat.com/errata/RHSA-2026:37272
• https://access.redhat.com/security/cve/CVE-2025-71319
• https://bugzilla.redhat.com/show_bug.cgi?id=2487296
• https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71319.json
• https://www.vulncheck.com/advisories/image-size-denial-of-service-via-infinite-loop-in-jx…
• https://web.archive.org/web/20260224152152/https://github.com/image-size/image-size/pull/…

References

• CVE Record
• NVD entry