CVE-2026-58066

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CVSS 3.0

9.8 critical

EPSS

<1%p14

Published

Jul 30, 2026 (Jul 30, 2026)

Modified

Aug 25, 2026

Description

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.

Vendors: rocket.chat
Products: rocket.chat
Weakness: CWE-287
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD CVE.org GitHub PoCs EPSS (0.2%)

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