Missing Authorization in Rocket.Chat - CVE-2026-55762
Published: November 9, 2026
Vulnerability identifier: #VU163157
CSH Severity: Medium
CVSS v4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-55762
CWE-ID: CWE-862
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a low-privileged remote attacker to deregister a Rocket.Chat workspace from Rocket.Chat Cloud, disabling paid features and push notifications.
The vulnerability exists due to missing authorization checks in the authenticated /api/v1/fingerprint endpoint when processing requests with setDeploymentAs set to new-workspace. A low-privileged remote attacker can submit this POST request using a standard user account to erase workspace cloud credentials and remove its license.
Affected software
Rocket.Chat
How to mitigate CVE-2026-55762
Install security update from vendor's website.
Rocket.Chat - addressed in versions 7.10.13, 8.0.7, 8.1.6, 8.2.6, 8.3.6, 8.4.4, 8.5.1