Missing Authentication for Critical Function in Rocket.Chat - CVE-2026-45677
Published: May 14, 2026
Vulnerability identifier: #VU131418
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: CVE-2026-45677
CWE-ID: CWE-306
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 improper authentication in SAML logout request processing when handling inbound LogoutRequest messages at the SP logout endpoint. A remote attacker can submit a valid-looking unsigned LogoutRequest for a target user to cause a denial of service.
Exploitation requires knowledge of the target user's SAML NameID.
Affected software
Rocket.Chat
How to mitigate CVE-2026-45677
Install security update from vendor's website.
Rocket.Chat - addressed in versions 7.10.11, 7.13.7, 8.0.5, 8.1.4, 8.2.3, 8.3.3, 8.4.1, 8.5.0