CVE-2026-55762

Deferred Deferred - Pending Action

Authentication Bypass in Rocket.Chat Workspace Deregistration

Publication date: 2026-06-24

Last updated on: 2026-06-25

Assigner: GitHub, Inc.

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-06-24

Last Modified

2026-06-25

Generated

2026-07-15

AI Q&A

2026-06-25

EPSS Evaluated

2026-07-13

NVD

CVE-2026-55762

Affected Vendors & Products

Vendor	Product	Version / Range
rocket_chat	rocket_chat	to 8.5.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Detection Guidance

This vulnerability can be detected by checking if the Rocket.Chat instance is running a vulnerable version prior to 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, or 7.10.13. Additionally, you can test if the /api/v1/fingerprint endpoint allows authenticated users to send a POST request with the payload {"setDeploymentAs": "new-workspace"} without proper authorization.

A suggested command to test this on your system or network is to use curl to send the POST request as an authenticated user:

curl -X POST https://your-rocket-chat-instance/api/v1/fingerprint -H "Content-Type: application/json" -H "X-Auth-Token: <user-auth-token>" -H "X-User-Id: <user-id>" -d '{"setDeploymentAs": "new-workspace"}'

If the request succeeds and the workspace is deregistered or the response indicates success without proper authorization checks, the system is vulnerable.

Executive Summary

This vulnerability exists in Rocket.Chat versions 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 requires authentication but does not perform any authorization checks. This means that any authenticated user, even those with standard user roles, can call this endpoint with the parameter {"setDeploymentAs": "new-workspace"} to permanently deregister the workspace from Rocket.Chat Cloud.

As a result, this action wipes all cloud credentials, removes the workspace license, disables push notifications for all users, and forces a manual re-registration process to recover the workspace.

Impact Analysis

The impact of this vulnerability is significant for any organization using affected versions of Rocket.Chat. An authenticated user with standard privileges can disrupt the entire workspace by deregistering it from Rocket.Chat Cloud.

All cloud credentials associated with the workspace will be wiped.
The workspace license will be removed.
Push notifications for all users will stop working.
Manual re-registration of the workspace will be required to restore normal operations.

Mitigation Strategies

To mitigate this vulnerability, you should upgrade Rocket.Chat to one of the fixed versions: 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, or 7.10.13.

Until the upgrade is applied, restrict authenticated user access to the POST /api/v1/fingerprint REST endpoint to prevent unauthorized deregistration of the workspace.

Compliance Impact

The provided information does not specify any direct impact of this vulnerability on compliance with common standards and regulations such as GDPR or HIPAA.

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