CVE-2026-55762

Rocket.Chat: Any Authenticated User Can Permanently Deregister Workspace from Rocket.Chat Cloud via Unprotected `/api/v1/fingerprint` Endpoint

State: Published
Severity: 8.1 High
Published: Jun 24, 2026
Updated: Jun 25, 2026
Reserved: Jun 17, 2026

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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.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H	GitHub_M

Weaknesses

CWE-862 Missing Authorization

Affected Products

Product	Versions
Rocket.ChatRocketChat	>= 8.5.0-rc.0, < 8.5.1Affected >= 8.4.0-rc.0, < 8.4.4Affected >= 8.3.0-rc.0, < 8.3.6Affected >= 8.2.0-rc.0, < 8.2.6Affected >= 8.1.0-rc.0, < 8.1.6Affected >= 7.11.0-rc.0, < 8.0.7Affected < 7.10.13Affected

References

https://github.com/RocketChat/Rocket.Chat/security/advisories/GHSA-8hhc-j325-rxqp

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