Vulnerability DatabaseCVE-2026-58066
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CVE-2026-58066
Published:July 30, 2026
Updated:August 04, 2026
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.
Affected Packages
https://github.com/RocketChat/Rocket.Chat.git (GITHUB):
Affected version(s) >=8.2.0 <8.2.7
Fix Suggestion:
Update to version 8.2.7
https://github.com/RocketChat/Rocket.Chat.git (GITHUB):
Affected version(s) >=8.0.0 <8.0.8
Fix Suggestion:
Update to version 8.0.8
https://github.com/RocketChat/Rocket.Chat.git (GITHUB):
Affected version(s) =8.6.0 <8.6.1
Fix Suggestion:
Update to version 8.6.1
https://github.com/RocketChat/Rocket.Chat.git (GITHUB):
Affected version(s) >=8.4.0 <8.4.5
Fix Suggestion:
Update to version 8.4.5
https://github.com/RocketChat/Rocket.Chat.git (GITHUB):
Affected version(s) >=8.3.0 <8.3.7
Fix Suggestion:
Update to version 8.3.7
https://github.com/RocketChat/Rocket.Chat.git (GITHUB):
Affected version(s) >=8.5.0 <8.5.2
Fix Suggestion:
Update to version 8.5.2
https://github.com/RocketChat/Rocket.Chat.git (GITHUB):
Affected version(s) >=0.8.0 <7.10.14
Fix Suggestion:
Update to version 7.10.14
https://github.com/RocketChat/Rocket.Chat.git (GITHUB):
Affected version(s) >=8.1.0 <8.1.7
Fix Suggestion:
Update to version 8.1.7
Related Resources (4)
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58066.json
https://hackerone.com/reports/3827674
https://github.com/RocketChat/Rocket.Chat/pull/41233
https://nvd.nist.gov/vuln/detail/CVE-2026-58066
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CVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Authentication
CWE-287
EPSS
Base Score:
0.24