---
id: CVE-2026-86189
title: >-
  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
summary: >-
  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
  ca…
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-73
vendor: WWBN
product: AVideo
affected:
  - AVideo <= 29.0
published: '2026-09-05'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:17:18.263'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86189'
references:
  - url: 'https://github.com/WWBN/AVideo/security/advisories/GHSA-cprx-fggj-7vpq'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/wwbn-avideo-unauthenticated-path-traversal-via-notify-ffmpeg-json-php
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00406
epssPercentile: 0.34679
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-18T17:07:13.644752Z'
ingestedAt: '2026-09-06T07:51:57.280Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.