Integer overflow in libheif - CVE-2026-47714
Published: May 20, 2026
Vulnerability identifier: #VU131972
CSH Severity: Medium
CVSS v4.0: 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
CVE-ID: CVE-2026-47714
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: struktur AG
Affected software:
libheif
libheif
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service and disclose sensitive information.
The vulnerability exists due to integer overflow or wraparound in the inline mask parsing code in libheif/region.cc when parsing a crafted HEIF file. A remote attacker can trick the victim into opening a crafted file to cause a denial of service and disclose sensitive information.
The issue is reachable when applications raise the max_image_size_pixels limit or disable it via LIBHEIF_SECURITY_LIMITS=off.
How to mitigate CVE-2026-47714
Install security update from vendor's website.