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Findings

CVE-2026-40935

WWBN AVideo is an open source video platform.

Published Apr 21, 2026 · updated Jun 17, 2026 · wwbn avideo

WWBN AVideo is an open source video platform. In versions 29.0 and prior, accepts the CAPTCHA length ( ) directly from the query string with no clamping or sanitization, letting any unauthenticated client force the server to generate a 1-character CAPTCHA word. Combined with a case-insensitive comparison over a ~33-character alphabet and the fact that failed validations do NOT consume the stored session token, an attacker can trivially brute-force the CAPTCHA on any endpoint that relies on (user registration, password recovery, contact form, etc.) in at most ~33 requests per session. Commit bf1c76989e6a9054be4f0eb009d68f0f2464b453 contains a fix.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 21, 2026 · NIST NVD

    Detected

    WWBN AVideo is an open source video platform. In versions 29.0 and prior, accepts the CAPTCHA length ( ) directly from the query string with no clamping or sanitization, letting any unauthenticated client force the server to generate a 1-character CAPTCHA word. Combined with a case-insensitive comparison over a ~33-character alphabet and the fact that failed validations do NOT consume the stored s

  2. Jun 17, 2026 · NIST NVD

    Updated

    WWBN AVideo is an open source video platform. In versions 29.0 and prior, accepts the CAPTCHA length ( ) directly from the query string with no clamping or sanitization, letting any unauthenticated client force the server to generate a 1-character CAPTCHA word. Combined with a case-insensitive comparison over a ~33-character alphabet and the fact that failed validations do NOT consume the stored s

Affected

  • cpe wwbn/avideoversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-40935

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-40935

    WWBN AVideo is an open source video platform. In versions 29.0 and prior, accepts the CAPTCHA length ( ) directly from the query string with no clamping or sanitization, letting any unauthenticated client force the server to generate a 1-character CAPT

    nvd.nist.gov

References