---
id: CVE-2026-120210
title: FFmpeg 5.0 through 9.0.2 Path Traversal via IMF Demuxer ASSETMAP Path
summary: >-
  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 a…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-22
vendor: FFmpeg
product: FFmpeg
affected:
  - FFmpeg >= 5.0 <= 9.0.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T15:34:30.703410Z'
published: '2026-10-31'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T15:34:41.525Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-120210'
references:
  - url: 'https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25341'
  - url: 'https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavformat/imfdec.c#L273'
  - url: 'https://github.com/FFmpeg/FFmpeg'
  - url: >-
      https://www.vulncheck.com/advisories/ffmpeg-5.0-through-9.0.2-path-traversal-via-imf-demuxer-assetmap-path
    label: >-
      VulnCheck Advisory: FFmpeg 5.0 through 9.0.2 Path Traversal via IMF
      Demuxer ASSETMAP Path
tags:
  - cve.org
epss: 0.00276
epssPercentile: 0.20135
ingestedAt: '2026-11-05T21:36:00.908Z'
---

## Overview

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

- `FFmpeg >= 5.0 <= 9.0.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.