{"id":"CVE-2026-84384","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-84384","summary":"libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.2, crafted HEIF or AVIF mime metadata and unci image data can cause decompress_brotli() and do_inflate()…","details":"libheif is a HEIF and AVIF file format decoder and encoder. From 1.19.0 until 1.23.2, crafted HEIF or AVIF mime metadata and unci image data can cause decompress_brotli() and do_inflate() to grow accumulated output without an effective size limit or MemoryHandle accounting. The brotli path has no output bound, while the zlib path checks only a small temporary buffer in a branch that valid streams do not reach, and overlapping icef units can decompress the same payload repeatedly. HeifContext::interpret_heif_file_images() processes multiple compressed metadata items during file opening, allowing a small file to consume unbounded memory and terminate the process. This issue is fixed in version 1.23.2.","published":"2026-09-18T16:17:11.900","modified":"2026-09-18T16:17:12.020","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/strukturag/libheif/commit/21893e8f66c8b79363ca2809391b07d35e1a95ec","label":"strukturag/libheif@21893e8"},"references":[{"type":"WEB","url":"https://github.com/strukturag/libheif/commit/21893e8f66c8b79363ca2809391b07d35e1a95ec"},{"type":"WEB","url":"https://github.com/strukturag/libheif/releases/tag/v1.23.2"},{"type":"WEB","url":"https://github.com/strukturag/libheif/security/advisories/GHSA-24wx-9w62-c96w"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-09-18T16:17:12.020"}}