Heap-based buffer overflow in Janus WebRTC Server - #VU155752
Published: October 14, 2026
Vulnerability identifier: #VU155752
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to a heap-based buffer overflow in the Record&Play plugin's playout thread when reading recorded frames using unchecked file-supplied lengths into a 1500-byte heap buffer. A remote attacker can trigger playback of a recording containing a frame length exceeding the buffer capacity to cause a denial of service.
Affected software
Janus WebRTC Server
Remediation
Install security update from vendor's website.
Janus WebRTC Server - addressed in versions 0.16.3, 1.4.3