Vulnerability in Wwbn Avideo
CVE-2026-84479
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (44.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 44.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
Weakness classification (CWE)
References
- github.com/WWBN/AVideo/security/advisories/GHSA-m9m3-gwh2-337c (vendor-advisory)
- www.vulncheck.com/advisories/wwbn-avideo-authentication-bypass-via-user-agent-h… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-84479?
- CVE-2026-84479 is a critical-severity vulnerability in Wwbn Avideo, classified under Authentication Bypass by Spoofing. CVSS score: 9.1/10. Published 2026-09-01.
- How severe is CVE-2026-84479?
- Critical severity. CVSS v3 base score is 9.1 out of 10.