PT-2026-66412 · Rocket.Chat · Rocket.Chat

Jayden · CVE-2026-58066 · Published 2026-07-30 · Updated 2026-07-30

Mitre

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Fix

Improper Authentication

Weakness Enumeration

CWE-287

Related Identifiers

CVE-2026-58066

Affected Products

Rocket.Chat

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-58066 · Security Note
• https://github.com/RocketChat/Rocket.Chat/pull/41233 · Note
• https://hackerone.com/reports/3827674 · Note