Vulnerability · Published Oct 31, 2026 · Assigned by VulnCheck
CVE-2026-120210FFmpeg 5.0 through 9.0.2 Path Traversal via IMF Demuxer ASSETMAP Path
Medium 4.3
In plain English
A medium-severity path traversal in FFmpeg from FFmpeg. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.3%top 79.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
FFmpeg 5.0 through 9.0.2 contains a path traversal vulnerability in the IMF demuxer that allows attackers to open files outside the package via unvalidated ASSETMAP Path elements. Attackers can supply a crafted IMF package with '..' or absolute paths to demux local MXF files, probe file existence and size, or trigger server-side requests.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | ffmpeg | no fix listed | DEBIAN-CVE-2026-120210 |
| Debian:13 | ffmpeg | no fix listed | DEBIAN-CVE-2026-120210 |
| Debian:14 | ffmpeg | no fix listed | DEBIAN-CVE-2026-120210 |
| Ubuntu:26.10 | ffmpeg | no fix listed | UBUNTU-CVE-2026-120210 |
Affected products (as reported)
Weakness: CWE-22 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25341 issue-tracking
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavformat/imfdec.c#L273 technical-description
- https://github.com/FFmpeg/FFmpeg product
- VulnCheck Advisory: FFmpeg 5.0 through 9.0.2 Path Traversal via IMF Demuxer ASSETMAP Path third-party-advisory