FFmpeg up to 9.0.2 IMF demuxer ASSETMAP path traversal

Summaryinfo

A vulnerability marked as problematic has been reported in FFmpeg up to 9.0.2. Affected by this issue is some unknown functionality of the component IMF demuxer. Performing a manipulation of the argument ASSETMAP results in path traversal. This vulnerability was named CVE-2026-120210. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as problematic, was found in FFmpeg up to 9.0.2. This affects an unknown code of the component IMF demuxer. The manipulation of the argument ASSETMAP with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality. The summary by CVE is:

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.

The advisory is shared at code.ffmpeg.org. This vulnerability is uniquely identified as CVE-2026-120210 since 10/31/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/31/2026). MITRE ATT&CK project uses the attack technique T1006 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-114731). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Multimedia Processing Software

Name

• FFmpeg

Version

• 9.0.0
• 9.0.1
• 9.0.2

License

• open-source

Website

• Product: https://ffmpeg.org/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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