What’s Vulnerable › Vulnerabilities

CVE-2026-84479: WWBN AVideo Authentication Bypass via User-Agent Header

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-01 · updated 2026-09-08
• Weakness: CWE-290

Description

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.

Affected products

• WWBN AVideo: through 29.0

References

• https://github.com/WWBN/AVideo/security/advisories/GHSA-m9m3-gwh2-337c
• https://www.vulncheck.com/advisories/wwbn-avideo-authentication-bypass-via-user-agent-header
• https://github.com/WWBN/AVideo/security/advisories/GHSA-m9m3-gwh2-337c

Get alerted when CVE-2026-84479 or the next vulnerability affects your stack