CVE-2026-86721 AVideo through c3edcc274c Authorization Bypass via Session Cookie
Attackers can hijack live broadcasts and publish to any user's RTMP stream without authentication by exploiting a session cookie override vulnerability.
- 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-2026-86721?
CVE-2026-86721 is a high-severity authentication bypass vulnerability in WWBN AVideo, published on 8 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Weakness: CWE-287
Which versions are affected by CVE-2026-86721?
How do I fix CVE-2026-86721?
No fix has been published for CVE-2026-86721 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-2026-86721 being exploited?
There is no known exploitation of CVE-2026-86721 in the wild and no public exploit code.
Sources
Also known as GHSA-5664-h9h4-3gwc, GHSA-x6f7-2rr5-x37c.