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

Quick assessment

Affected

FFmpeg FFmpeg

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FFmpeg 5.0 至 9.0.2 版本的 IMF 解复用器中存在路径遍历漏洞。攻击者可通过未经验证的 ASSETMAP 路径元素，打开包外的文件。攻击者可构造包含 ".." 或绝对路径的 IMF 包，从而解复用本地 MXF 文件、探测文件是否存在及其大小，或触发服务器端请求。

CVSS 4.3 · Medium Updated Nov 01, 2026

Possible ATT&CK Techniques 2 AI

T1083 · File and Directory Discovery T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
FFmpeg	FFmpeg	`5.0≤ 9.0.2`	affected

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Vulnerability Information

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Vulnerability Title

FFmpeg 5.0 through 9.0.2 Path Traversal via IMF Demuxer ASSETMAP Path

Source: CVE Program / CVE List V5

Vulnerability 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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

对路径名的限制不恰当(路径遍历)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
FFmpeg	FFmpeg	5.0 ~ 9.0.2	-

II. Public POCs for CVE-2026-120210

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-120210

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Other References for CVE-2026-120210 (3)

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://www.vulncheck.com/advisories/ffmpeg-5.0-through-9.0.2-path-traversal-via-imf-demuxer-assetmap-path third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-120210

IV. Related Vulnerabilities

Same product: FFmpeg

Same vendor: FFmpeg

Same weakness: CWE-22