What is CVE-2026-86721?

CVE-2026-86721 is a high-severity vulnerability in Wwbn Avideo, classified under Improper Authentication. CVSS score: 7.5/10. Published 2026-09-08.

How severe is CVE-2026-86721?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Wwbn Avideo

CVE-2026-86721

AVideo through commit c3edcc274c contains an authorization bypass vulnerability where a session cookie named 'key' with value 'value' overrides the $_REQUEST['key'] parameter in saveLive.php and related endpoints. Attackers can publish to any user's RTMP stream without authentication by using the known constant stream key value to hijack live broadcasts.

Vulnerability class: Broken Authentication

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Wwbn Avideo

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-86721?: CVE-2026-86721 is a high-severity vulnerability in Wwbn Avideo, classified under Improper Authentication. CVSS score: 7.5/10. Published 2026-09-08.
How severe is CVE-2026-86721?: High severity. CVSS v3 base score is 7.5 out of 10.