---
id: CVE-2026-84479
title: >-
  WWBN AVideo (current e01e41ecc and earlier) makes three login-time security
  controls depend solely on the client-supplied User-Agent header
summary: >-
  WWBN AVideo (current e01e41ecc and earlier) makes three login-time security
  controls depend solely on the client-supplied User-Agent header. The
  isAVideoEncoder()/isAVideoMobileApp() checks match HTTP_USER_AGENT against a
  hardcoded liter…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-290
published: '2026-09-01'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:18:59.270'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-84479'
references:
  - url: 'https://github.com/WWBN/AVideo/security/advisories/GHSA-m9m3-gwh2-337c'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/wwbn-avideo-authentication-bypass-via-user-agent-header
    label: disclosure@vulncheck.com
  - url: 'https://github.com/WWBN/AVideo/security/advisories/GHSA-m9m3-gwh2-337c'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00549
epssPercentile: 0.43524
ingestedAt: '2026-09-08T21:11:12.289Z'
---

## Overview

WWBN AVideo (current e01e41ecc and earlier) makes three login-time security controls depend solely on the client-supplied User-Agent header. The isAVideoEncoder()/isAVideoMobileApp() checks match HTTP_USER_AGENT against a hardcoded literal ("AVideoEncoder"/"AVideoMobileApp") with no IP check or shared secret. An attacker who submits valid credentials and sets User-Agent: AVideoEncoder bypasses two-factor authentication, skips brute-force captcha escalation, and avoids being recorded in the login/device audit history. No patch is available at the time of publication.

## Remediation

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