CVE-2026-32739

6.5 MEDIUM

libheif is a HEIF and AVIF file format decoder and encoder

Published: 2026-05-19 · Last updated: 2026-05-20

Severity and scoring

CVSS: 6.5 MEDIUM
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE: CWE-835

Affected products

Vendor	Product
struktur	libheif

Description

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.

Source: NVD

References

[NVD]https://nvd.nist.gov/vuln/detail/CVE-2026-32739
[Other]https://github.com/strukturag/libheif/releases/tag/v1.22.0
[Vendor advisory]https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8c
[Vendor advisory]https://github.com/strukturag/libheif/security/advisories/GHSA-j9g7-q9hv-gq8c

Related CVEs

Same vendor

CVE-2026-41071 — libheif is a HEIF and AVIF file format decoder and encoder (8.1 HIGH)
CVE-2026-41069 — libheif is a HEIF and AVIF file format decoder and encoder (6.5 MEDIUM)
CVE-2026-32740 — libheif is a HEIF and AVIF file format decoder and encoder (8.8 HIGH)
CVE-2026-32738 — libheif is a HEIF and AVIF file format decoder and encoder (6.5 MEDIUM)

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