{"id":"JLSEC-2026-1172","summary":"FFmpeg versions 2.1 through 8.1.2 contains a heap buffer overflow vulnerability in the VobSub...","details":"FFmpeg versions 2.1 through 8.1.2 contains a heap buffer overflow vulnerability in the VobSub subtitle demuxer that allows attackers to corrupt adjacent heap memory by supplying a malicious .sub/.idx subtitle file declaring more distinct stream IDs than the fixed-size array bounds in `libavformat/mpeg.c`. Attackers can craft a subtitle file with excessive distinct stream IDs to trigger unbounded writes beyond the vobsub-\u003eq[] array boundary via `ff_subtitles_queue_insert()`, potentially achieving arbitrary code execution in any application using FFmpeg's VobSub demuxer.","modified":"2026-08-08T23:15:07.089890553Z","published":"2026-08-07T13:27:45.313Z","upstream":["CVE-2026-64830","GHSA-jphx-q7f7-4x8r","EUVD-2026-47747"],"database_specific":{"license":"CC-BY-4.0","sources":[{"modified":"2026-07-28T17:00:32.043Z","published":"2026-07-22T17:16:58.557Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-64830","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64830","database_specific":{"status":"Analyzed"},"id":"CVE-2026-64830","imported":"2026-08-08T05:24:16.002Z"},{"id":"GHSA-jphx-q7f7-4x8r","imported":"2026-08-08T05:25:32.520Z","modified":"2026-07-22T18:32:47Z","published":"2026-07-22T18:32:39Z","url":"https://api.github.com/advisories/GHSA-jphx-q7f7-4x8r","html_url":"https://github.com/advisories/GHSA-jphx-q7f7-4x8r"},{"modified":"2026-07-28T01:06:01Z","published":"2026-07-22T16:33:05Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-47747","html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-47747","id":"EUVD-2026-47747","imported":"2026-08-08T05:24:18.794Z"}]},"references":[{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/dbd495f066a85ba96b17433f4306582aa37c3951"},{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23657"},{"type":"WEB","url":"https://github.com/advisories/GHSA-jphx-q7f7-4x8r"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64830"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/ffmpeg-heap-buffer-overflow-via-vobsub-subtitle-demuxer"}],"affected":[{"package":{"name":"FFMPEG_jll","ecosystem":"Julia","purl":"pkg:julia/FFMPEG_jll?uuid=b22a6f82-2f65-5046-a5b2-351ab43fb4e5"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"9.0.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1172.json"}},{"package":{"name":"FFMPEG_nogpl_jll","ecosystem":"Julia","purl":"pkg:julia/FFMPEG_nogpl_jll?uuid=a6892c6b-5768-548c-b024-ff8dabf482c5"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"9.0.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1172.json"}},{"package":{"name":"FFplay_jll","ecosystem":"Julia","purl":"pkg:julia/FFplay_jll?uuid=c4dce911-e170-5107-8314-c7bdc6785395"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"9.0.0+0"}]}],"database_specific":{"source":"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1172.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/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"}]}