CVE-2026-49271 | libheif is a HEIF and AVIF file format decoder and encoder. … | CVSS 6.5 MEDIUM

Description

libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.1, the uncompressed HEIF decoder validates explicit icef compressed-unit offsets using unit_offset + unit_size. Because the addition can wrap, a crafted HEIF file can pass the range check and then construct a vector from iterators outside the compressed item buffer, producing an out-of-bounds heap read and crash. Version 1.22.1 patches the issue.

Metadata

CVE ID: CVE-2026-49271
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-05-28 20:07 UTC
Published: 2026-06-19 17:16 UTC
Last updated: 2026-06-19 17:16 UTC
Primary CWE: CWE-125
CWE-125: Out-of-bounds Read
Vendor / Product: strukturag / libheif
Sources: cve.org · NVD

Severity & Metrics

6.5 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products (1)

Vendor	Product	Platform	Versions
strukturag	libheif	—	< 1.22.1

Weakness (CWE)

CWE	Source	Description
CWE-125	cna	CWE-125: Out-of-bounds Read

CVSS scores (1)

Score	Severity	Version	Source	Vector
6.5	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References (1)

https://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vf https://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vf