CVE-2026-107678CWE-674

CVE-2026-107678

Medium · published October 8, 2026

CVSS v3.1
4.7
EPSS
0%
Percentile
0.6
In the wild
Unconfirmed
What it is

FFmpeg through 9.0.2 contains a stack exhaustion vulnerability in av_encryption_init_info_free() in libavutil/encryption_info.c, which recursively frees AVEncryptionInitInfo linked lists built by the MOV demuxer's mov_read_pssh(). Attackers can supply a crafted MP4 file with tens of thousands of small pssh boxes to exhaust the stack and crash the process, while also causing quadratic CPU consumption.

The record
Technical detail
CVSS v3.1
4.7 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
5.7 · CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS
0.00094 · 0.6th percentile
Weakness
CWE-674 · Uncontrolled Recursion
Published
2026-10-08T20:17Z
Affected products (1)
ProductVersionsFixed in
ffmpeg/ffmpeg≤ 9.0.2—
References (5)
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24593 · [email protected]https://ffmpeg.org/ · [email protected]https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavformat/mov.c#L8070 · [email protected]https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavutil/encryption_info.c#L219-L231 · [email protected]https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-stack-exhaustion-via-recursive-free-of-pssh-boxes · [email protected]
EPSS history
Timeline
  • 10 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 08 OCT 15:28Z
    FFmpeg through 9.0.2 Stack Exhaustion via Recursive Free of pssh Boxes
    cvelistv5
  • 08 OCT 15:28Z
    FFmpeg through 9.0.2 Stack Exhaustion via Recursive Free of pssh Boxes
    cvelistv5