Server-Side Request Forgery (SSRF) in Janus WebRTC Server - #VU151865
Published: September 23, 2026
Vulnerability identifier: #VU151865
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to send arbitrary commands to internal services.
The vulnerability exists due to improper URL protocol restriction in the TextRoom plugin's room post and new_post URL handling when processing API-supplied URLs. A remote attacker can supply a gopher URL through the plugin signaling API to send arbitrary commands to internal services.
Requests made through this vector are blind, and the TextRoom plugin does not set a timeout for them.
Affected software
Janus WebRTC Server
Remediation
Install security update from vendor's website.
Janus WebRTC Server - addressed in versions 0.16.2, 1.4.2