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.
{
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55762.json",
"cwe_ids": [
"CWE-862"
]
}{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "8.5.0-rc.0"
},
{
"fixed": "8.5.1"
},
{
"introduced": "8.4.0-rc.0"
},
{
"fixed": "8.4.4"
},
{
"introduced": "8.3.0-rc.0"
},
{
"fixed": "8.3.6"
},
{
"introduced": "8.2.0-rc.0"
},
{
"fixed": "8.2.6"
},
{
"introduced": "8.1.0-rc.0"
},
{
"fixed": "8.1.6"
},
{
"introduced": "7.11.0-rc.0"
},
{
"fixed": "8.0.7"
},
{
"introduced": "0"
},
{
"fixed": "7.10.13"
}
]
}