CVE-2026-55762 Missing authorization in Rocket.Chat
Any authenticated user can permanently deregister the workspace from Rocket.Chat Cloud, breaking notifications and requiring manual recovery.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-55762?
CVE-2026-55762 is a high-severity missing authorization vulnerability in RocketChat Rocket.Chat, published on 24 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13, the POST /api/v1/fingerprint REST endpoint enforces authentication (authRequired: true) but performs no authorization check. Any authenticated user — including a standard user role account — can call this endpoint with {"setDeploymentAs": "new-workspace"} to permanently deregister the workspace from Rocket.Chat Cloud. This wipes all cloud credentials, removes the workspace license, breaks push notifications for all users, and requires manual re-registration to recover. This vulnerability is fixed in 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13.
Weakness: CWE-862
Which versions are affected by CVE-2026-55762?
How do I fix CVE-2026-55762?
No fix has been published for CVE-2026-55762 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-55762 being exploited?
There is no known exploitation of CVE-2026-55762 in the wild and no public exploit code.
Sources
Also known as GHSA-8hhc-j325-rxqp.