Vulnerability · Published Sep 5, 2026 · Assigned by VulnCheck

CVE-2026-86189WWBN AVideo Unauthenticated Path Traversal via notify.ffmpeg.json.php

Critical 9.8

In plain English

A critical-severity security flaw in AVideo from WWBN. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.7% (higher than 54% of all known vulnerabilities).

Severity (CVSS 3.1)9.8Critical

Exploit odds (30 days)0.7%top 46.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 (as reported)

Vendor	Product	Versions
WWBN	AVideo	0 – through 29.0

Weakness: CWE-73 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References

GitHub Security Advisory (GHSA-cprx-fggj-7vpq) vendor-advisory
VulnCheck Advisory: WWBN AVideo Unauthenticated Path Traversal via notify.ffmpeg.json.php third-party-advisory