Rocket.Chat's SAML SSO before versions 8.7.0, 8.6.1, 8.5.2, 8.4.5, 8.3.7, 8.2.7, 8.1.7, 8.0.8, and 7.10.14 verified XML signatures but did not bind the validated signature to samlp:Response / saml:Assertion. An attacker could submit a wrapped document carrying forged identity attributes alongside any valid signature made by the trusted IdP certificate, and log in as an arbitrary user.
{
"cwe_ids": [
"CWE-287"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58066.json",
"cna_assigner": "hackerone",
"unresolved_ranges": [
{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"fixed": "8.7.0"
}
]
}
]
}{
"source": "AFFECTED_FIELD",
"extracted_events": [
{
"introduced": "0"
},
{
"fixed": "8.6.1"
},
{
"fixed": "8.5.2"
},
{
"fixed": "8.4.5"
},
{
"fixed": "8.3.7"
},
{
"fixed": "8.2.7"
},
{
"fixed": "8.1.7"
},
{
"fixed": "8.0.8"
},
{
"fixed": "7.10.14"
}
]
}