CVE-2026-84447

libheif is a HEIF and AVIF file format decoder and encoder. In 1.23.1 and earlier, crafted grid, iovl, and iden reference graphs can repeatedly decode the same base image because processed_ids is copied per branch and ImageItem::decode_image() has no shared operation budget. This vulnerability is fixed in 1.23.2.

• CWE-770

• https://github.com/strukturag/libheif/commit/30b52a4e829efe0ee6d7208e8500b99f664af5e9
• https://github.com/strukturag/libheif/releases/tag/v1.23.2
• https://github.com/strukturag/libheif/security/advisories/GHSA-x8xm-cm2c-cfc8
• https://github.com/strukturag/libheif/security/advisories/GHSA-x8xm-cm2c-cfc8

Published

Sep 18, 2026

Last Modified

Sep 18, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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