CVE-2026-86189: Wwbn Avideo

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Wwbn Avideo: up to and including 29.0

Published 2026-09-05. Last modified 2026-09-18.