{"affected":[{"defaultStatus":"unaffected","product":"libheif","source":"CNA: VulnCheck","vendor":"strukturag","versions":[{"lessThan":"1.23.3","status":"affected","version":"1.18.0","versionType":"semver"}]}],"cveId":"CVE-2026-120208","cwes":["CWE-122"],"description":"libheif 1.18.0 before 1.23.3 contains a heap-based buffer overflow vulnerability in unc_decoder_mixed_interleave::processTile() that allows attackers to write out of bounds by supplying chroma components with unequal bit depths. Attackers can craft a HEIF file declaring, for example, 16-bit Cb and 8-bit Cr to trigger file-controlled heap writes past the Cr plane, potentially achieving code execution in image-processing pipelines.","epss":{"date":"2026-11-02","percentile":0.30339,"score":0.00365},"exploits":[],"kev":null,"metrics":[{"score":7.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":7.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1793641527671,"publishedAt":1793467555507,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/strukturag/libheif/security/advisories/GHSA-x8r2-mggj-j6wr"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/strukturag/libheif/commit/9d3cd91d7b1c8c68deef6d06057ab956bcb0dfb9"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/strukturag/libheif/releases/tag/v1.23.3"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/strukturag/libheif/blob/v1.23.2/libheif/codecs/uncompressed/unc_decoder_mixed_interleave.cc#L95"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/libheif-1.18.0-before-1.23.3-heap-buffer-overflow-via-unci-mixed-interleave-decoder"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/strukturag/libheif/commit/9d3cd91d7b1c8c68deef6d06057ab956bcb0dfb9"}],"revision":"98a5f75a2710a80547a89eddbeb5d50d82520b09a3ee60a46139cc52c1f05fa6","sources":[{"modifiedAt":1793641527671,"name":"CNA: VulnCheck","retrievedAt":1793642962540,"url":"https://www.cve.org/CVERecord?id=CVE-2026-120208"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793642970078,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-120208"}],"ssvc":{"assessedAt":1793639384328,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"total"},"status":"published","title":"libheif 1.18.0 before 1.23.3 Heap Buffer Overflow via unci Mixed-Interleave Decoder","updatedAt":1793642970078}