RocketChat Rocket.Chat up to 8.4.x SAML Service serviceProviderOptions.cert signature verification

Summaryinfo

A vulnerability was found in RocketChat Rocket.Chat up to 8.4.x. It has been rated as critical. Affected is an unknown function of the file serviceProviderOptions.cert of the component SAML Service. The manipulation leads to signature verification. This vulnerability is referenced as CVE-2026-46423. Remote exploitation of the attack is possible. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in RocketChat Rocket.Chat up to 8.4.x. It has been rated as critical. This issue affects an unknown function of the file serviceProviderOptions.cert of the component SAML Service. The manipulation with an unknown input leads to a signature verification vulnerability. Using CWE to declare the problem leads to CWE-347. The product does not verify, or incorrectly verifies, the cryptographic signature for data. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11, Rocket.Chat's SAML service provider implementation silently skips both SAML Response and Assertion signature validation when the configured IdP certificate field is empty. The verifySignatures routine performs an early return when serviceProviderOptions.cert is falsy, which is the default state of the setting. Because provider registration only gates on the SAML "enabled" toggle and not on the presence of a certificate, an administrator who enables SAML without pasting an IdP certificate obtains a fully wired, publicly reachable SAML login endpoint that accepts unsigned or attacker-supplied assertions. This is a default-configuration authentication-bypass class: the fail-open branch is reached with no misconfiguration beyond leaving a field at its shipped default. This vulnerability is fixed in 8.5.0, 8.4.1, 8.3.3, 8.2.3, 8.1.4, 8.0.5, 7.13.7, and 7.10.11.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-46423 since 05/14/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

Upgrading to version 7.10.11, 7.13.7, 8.0.5, 8.1.4, 8.2.3, 8.3.3, 8.4.1 or 8.5.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Chat Software

Vendor

• RocketChat

Name

• Rocket.Chat

Version

• 7.10.0
• 7.10.1
• 7.10.2
• 7.10.3
• 7.10.4
• 7.10.5
• 7.10.6
• 7.10.7
• 7.10.8
• 7.10.9
• 7.10.10
• 7.13.0
• 7.13.1
• 7.13.2
• 7.13.3
• 7.13.4
• 7.13.5
• 7.13.6
• 8.0
• 8.0.0
• 8.0.1
• 8.0.2
• 8.0.3
• 8.0.4
• 8.1
• 8.1.0
• 8.1.1
• 8.1.2
• 8.1.3
• 8.2
• 8.2.0
• 8.2.1
• 8.2.2
• 8.3
• 8.3.0
• 8.3.1
• 8.3.2
• 8.4
• 8.4.0

License

• free

Website

• Product: https://github.com/RocketChat/Rocket.Chat/

CPE 2.3info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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