CVE-2026-125264
FFmpeg through 9.0.2 CPU Exhaustion via JPEG XL Parser TOC Count
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
FFmpeg through 9.0.2 contains an uncontrolled resource consumption vulnerability in parse_frame_header() in libavcodec/jpegxl_parser.c that fails to validate TOC entry counts against remaining input. Attackers can supply a crafted JPEG XL frame header with a permuted TOC and huge toc_count, making the parser loop excessively and exhaust CPU.
| CWE | CWE-606 |
| Vendor | ffmpeg |
| Product | ffmpeg |
| Published | Nov 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
FFmpeg / FFmpeg
0 ≤ 9.0.2
References
code.ffmpeg.org: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/25569 github.com: https://github.com/FFmpeg/FFmpeg/commit/bc896c613ec0d4ad0108d62fbdda0196f69e7121 github.com: https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavcodec/jpegxl_parser.c#L1343 github.com: https://github.com/FFmpeg/FFmpeg vulncheck.com: https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-cpu-exhaustion-via-jpeg-xl-parser-toc-count
Credits
Joshua Rogers (AISLE Research) Michael Niedermayer