CVE-2026-120210 FFmpeg 5.0 through 9.0.2 Path Traversal via IMF Demuxer ASSETMAP Path

Medium 5.3 Published 31 Oct 2026 Updated 5 Nov 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-120210?

CVE-2026-120210 is a medium-severity vulnerability in FFmpeg, published on 31 Oct 2026.

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.

Weakness: CWE-22

Which versions are affected by CVE-2026-120210?

How do I fix CVE-2026-120210?

No fix has been published for CVE-2026-120210 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-120210 being exploited?

There is no known exploitation of CVE-2026-120210 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2026-120210, ECHO-0df4-e222-0c04, GHSA-437x-xcvf-w98c, UBUNTU-CVE-2026-120210.