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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

High8.1EPSS 0.47%
Published
Updated
Reserved
Assigned by
GitHub_M

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 scores of CVE-2026-55762, by who scored it
Scored byCVSSScoreVector
GitHub_MCNA (assigner)3.1High8.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
NVDNVD · Deferred3.1High8.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
EPSS (exploitation in 30 days)
0.47% · top 59% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: total
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.

Weakness

Affected products

  • RocketChat · Rocket.Chat

    • affected >= 8.5.0-rc.0, < 8.5.1
    • affected >= 8.4.0-rc.0, < 8.4.4
    • affected >= 8.3.0-rc.0, < 8.3.6
    • affected >= 8.2.0-rc.0, < 8.2.6
    • affected >= 8.1.0-rc.0, < 8.1.6
    • affected >= 7.11.0-rc.0, < 8.0.7
    • affected < 7.10.13

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

Badge for a README or a ticket

CVE-2026-55762 badge
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Record last updated .