CVE-2026-84479 WWBN AVideo Authentication Bypass via User-Agent Header
Attackers can bypass two-factor authentication and audit logging by spoofing the User-Agent header in WWBN AVideo.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84479?
CVE-2026-84479 is a critical authentication bypass vulnerability in WWBN AVideo, published on 1 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-290
Which versions are affected by CVE-2026-84479?
How do I fix CVE-2026-84479?
No fix has been published for CVE-2026-84479 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-84479 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84479 exists.
Sources
Also known as GHSA-5vfg-9qx8-h8wf, GHSA-m9m3-gwh2-337c.