PT-2026-49254 · Julia · Libheif Jll

Published 2026-06-05 · Updated 2026-06-05

OSV

CVSS v3.1

6.5

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

libheif is a HEIF and AVIF file format decoder and encoder. In versions 1.21.2 and below, a crafted 800-byte HEIF sequence file causes an infinite loop in Box stts::get sample duration(), consuming 100% CPU indefinitely with zero progress, leading to DoS. The loop has no iteration limit or timeout and is triggered during file open (parsing) - before any user interaction or image decoding. The process stays alive (no crash, no error logged), making it invisible to crash-based monitoring. This issue has been fixed in version 1.22.0.

Fix

Related Identifiers

JLSEC-2026-571

Affected Products

Libheif Jll

References · 3

• https://osv.dev/vulnerability/JLSEC-2026-571 · Vendor Advisory
• https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8c · Note
• https://github.com/strukturag/libheif/releases/tag/v1.22.0 · Note