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CVE-2026-55762— Rocket.Chat: Any Authenticated User Can Permanently Deregister Workspace from Rocket.Chat Cloud via Unprotected `/api/v1/fingerprint` Endpoint

CVSS 8.1 · High EPSS 0.32% · P24
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I. Basic Information for CVE-2026-55762

Vulnerability Information
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Vulnerability Title
Rocket.Chat: Any Authenticated User Can Permanently Deregister Workspace from Rocket.Chat Cloud via Unprotected `/api/v1/fingerprint` Endpoint
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
RocketChatRocket.Chat >= 8.5.0-rc.0, < 8.5.1 -

II. Public POCs for CVE-2026-55762

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III. Intelligence Information for CVE-2026-55762

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Other References for CVE-2026-55762 (1)

Same Patch Batch · RocketChat · 2026-06-24 · 12 CVEs total

CVE-2026-456889.1 CRITICALRocket.Chat: Pre-Auth NoSQL Injection in CAS Login Handler leading to Arbitrary CAS/SAML U
CVE-2026-456899.1 CRITICALRocket.Chat: Pre-Auth NoSQL Injection in OAuth2 Token Endpoint leading to Arbitrary User A
CVE-2026-456878.5 HIGHRocket.Chat: Authenticated Arbitrary Data Export Theft via Mass Assignment in sendFileMess
CVE-2026-557597.4 HIGHRocket.Chat: Apple Sign-In skips JWT claims validation, allowing expired and cross-audienc
CVE-2026-492786.7 MEDIUMRocket.Chat: Livechat Visitor Profile Disclosure Leaks Bearer Token and Enables Visitor Im
CVE-2026-477334.4 MEDIUMRocket.Chat: Missing URL protocol sanitization in ImageElement allows javascript: URLs in
CVE-2026-45677Rocket.Chat: Lack of SAML Signature Check During Logout Could Lead To DoS
CVE-2026-45757Rocket.Chat: users.deactivateIdle` deactivates accounts without revoking existing login to
CVE-2026-49277Rocket.Chat: OAuth access and refresh tokens remain valid after account deactivation
CVE-2026-46423Rocket.Chat: SAML signature validation skipped when IdP certificate field is empty
CVE-2026-55666Rocket.Chat: Email Parameter Fallback Leads To Account Takeover Within Apple OAuth

IV. Related Vulnerabilities

Same product: Rocket.Chat
Same vendor: RocketChat
Same weakness: CWE-862

V. Comments for CVE-2026-55762

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