{"id":"JLSEC-2026-1097","details":"libheif is a HEIF and AVIF file format decoder and encoder. The fix for CVE-2026-3949 (commit `b97c8b5`, PR #1712) introduced an integer overflow in the very security check it added. The check itself can be bypassed, allowing a crafted HEIF file with a VVC track to trigger the same out-of-bounds heap read that CVE-2026-3949 was meant to prevent. This is a separate, currently-unpatched vulnerability. Issue #1712 was closed as fixed without testing the edge case where `size` is near `UINT32_MAX`. Version 1.22.0 patches the issue.","modified":"2026-08-03T13:30:04.019294150Z","published":"2026-08-03T13:28:07.759Z","upstream":["CVE-2026-47251","EUVD-2026-46435"],"database_specific":{"license":"CC-BY-4.0","sources":[{"html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47251","database_specific":{"status":"Analyzed"},"id":"CVE-2026-47251","imported":"2026-08-03T06:12:12.958Z","modified":"2026-07-27T15:19:27.190Z","published":"2026-07-21T22:17:12.800Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-47251"},{"html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-46435","id":"EUVD-2026-46435","imported":"2026-08-03T06:12:13.008Z","modified":"2026-07-22T13:48:12Z","published":"2026-07-21T21:18:56Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-46435"}]},"references":[{"type":"WEB","url":"https://github.com/strukturag/libheif/issues/1712"},{"type":"WEB","url":"https://github.com/strukturag/libheif/security/advisories/GHSA-p6q9-fhf2-vj9v"}],"affected":[{"package":{"name":"libheif_jll","ecosystem":"Julia","purl":"pkg:julia/libheif_jll?uuid=a13778fd-9a17-58b4-b5a0-4b4a242815a9"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.22.2000+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1097.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}