SB2026072954 - Discourse update for libheif

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Main Vulnerability Database SB2026072954

SB2026072954 - Discourse update for libheif

Published: July 29, 2026

Security Bulletin ID SB2026072954
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-32882)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to cause a denial of service or disclose sensitive information.

The vulnerability exists due to out-of-bounds read in HeifPixelImage::overlay() when parsing a crafted HEIF file containing an overlay image whose child image uses a different alpha-channel bit depth than the color channels. A remote attacker can supply a specially crafted HEIF file to cause a denial of service or disclose sensitive information.

User interaction is required to open or otherwise process the crafted file.


Remediation

Install update from vendor's website.

References