{"id":"JLSEC-2026-1183","summary":"FFmpeg through 8.1.2, fixed in commit 5d7112c, contains an uncontrolled resource consumption...","details":"FFmpeg through 8.1.2, fixed in commit 5d7112c, contains an uncontrolled resource consumption vulnerability in the IAMF demuxer that allows an unauthenticated attacker to cause multi-gigabyte memory allocation from a 17-byte input file by supplying a crafted `count_label` field. The `mix_presentation_obu()` function in `libavformat/iamf_parse.c` calls `av_calloc`(`count_label`, sizeof(*`language_label`)) with an attacker-controlled value before validating available OBU data, enabling an allocation amplification of approximately 126 million bytes per input byte that exhausts process memory or triggers an OOM-kill during format probing.","modified":"2026-08-08T23:15:05.743264260Z","published":"2026-08-07T13:27:45.313Z","upstream":["CVE-2026-66037","GHSA-qqrg-chvw-q8jp","EUVD-2026-48739"],"database_specific":{"sources":[{"id":"CVE-2026-66037","imported":"2026-08-08T05:24:16.208Z","modified":"2026-08-07T00:58:46.967Z","published":"2026-07-24T20:18:20.573Z","url":"https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-66037","html_url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66037","database_specific":{"status":"Analyzed"}},{"imported":"2026-08-08T05:24:56.116Z","modified":"2026-07-24T21:32:28Z","published":"2026-07-24T21:32:22Z","url":"https://api.github.com/advisories/GHSA-qqrg-chvw-q8jp","html_url":"https://github.com/advisories/GHSA-qqrg-chvw-q8jp","id":"GHSA-qqrg-chvw-q8jp"},{"html_url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-48739","id":"EUVD-2026-48739","imported":"2026-08-08T05:24:18.416Z","modified":"2026-07-28T01:06:28Z","published":"2026-07-24T19:36:53Z","url":"https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-48739"}],"license":"CC-BY-4.0"},"references":[{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/86708357d126af84c16f80d9c57335d1e8c845c5"},{"type":"WEB","url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23627"},{"type":"WEB","url":"https://github.com/advisories/GHSA-qqrg-chvw-q8jp"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66037"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/ffmpeg-iamf-demuxer-uncontrolled-resource-consumption-via-mix-presentation-obu"}],"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-2026-1183.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-2026-1183.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-2026-1183.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/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"}]}