CVE-2026-86189CWE-73

CVE-2026-86189

Critical · published September 5, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
33.9
In the wild
Unconfirmed
What it is

WWBN AVideo contains a path traversal vulnerability in notify.ffmpeg.json.php that allows unauthenticated attackers to write files to arbitrary locations by supplying a caller-chosen path in the avideoRelativePath parameter. Attackers can replay any previously issued ciphertext as a notifyCode token, which is decrypted but never validated, to bypass authentication and write files to the application root and subdirectories.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
9.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00406 · 33.9th percentile
Weakness
CWE-73 · External Control of File Name or Path
Published
2026-09-05T17:18Z
References (2)
https://github.com/WWBN/AVideo/security/advisories/GHSA-cprx-fggj-7vpq · [email protected]https://www.vulncheck.com/advisories/wwbn-avideo-unauthenticated-path-traversal-via-notify-ffmpeg-json-php · [email protected]
EPSS history
Timeline
  • 07 SEP 03:36Z
    EPSS moved — → 0%
    epss
  • 05 SEP 12:09Z
    WWBN AVideo Unauthenticated Path Traversal via notify.ffmpeg.json.php
    cvelistv5