Authorization bypass through user-controlled key in AVideo - CVE-2026-56345
Published: November 11, 2026
Vulnerability identifier: #VU165917
CSH Severity: High
CVSS v4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-56345
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to take over arbitrary user accounts, including administrator accounts.
The vulnerability exists due to authorization bypass through a user-controlled identifier in AVideo's enabled Meet plugin when uploadRecordedVideo.json.php derives users_id from filenames and invokes passwordless User->login(true, true). A remote attacker can obtain the shared secret through configuration disclosure or token-check timing analysis, then submit a bearer-authenticated upload named 1-anything.mp4 to receive an administrator session.
Affected software
AVideo
How to mitigate CVE-2026-56345
Install security update from vendor's website.
AVideo - update to 29.1.0