---
id: CVE-2026-86723
title: >-
  AVideo through c3edcc274c389816d434acadac07ee78eaf330c1 contains an
  authentication bypass vulnerability in LoginControl::verifyChallenge() that
  uses loose comparison (==) instead of strict comparison (===) against unset
  session values
summary: >-
  AVideo through c3edcc274c389816d434acadac07ee78eaf330c1 contains an
  authentication bypass vulnerability in LoginControl::verifyChallenge() that
  uses loose comparison (==) instead of strict comparison (===) against unset
  session values. A…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-287
vendor: WWBN
product: AVideo
affected:
  - AVideo <= c3edcc274c389816d434acadac07ee78eaf330c1
published: '2026-09-08'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T19:53:13.400'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-86723'
references:
  - url: 'https://github.com/WWBN/AVideo/security/advisories/GHSA-vmpj-f3mf-q4j2'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/avideo-logincontrol-pgp-authentication-bypass-via-verifychallenge
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-08T15:34:14.661407Z'
ingestedAt: '2026-09-08T15:33:26.987Z'
epss: 0.00475
epssPercentile: 0.38453
---

## Overview

AVideo through c3edcc274c389816d434acadac07ee78eaf330c1 contains an authentication bypass vulnerability in LoginControl::verifyChallenge() that uses loose comparison (==) instead of strict comparison (===) against unset session values. Attackers with only a password can submit an empty request to verifyChallenge.json.php to bypass PGP two-factor authentication and gain full authenticated access.

## Remediation

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