CVE-2026-58066

EUVD-2026-51023
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 14.43%
Affected Products (NVD)
VendorProductVersion
rocket.chatrocket.chat
𝑥
< 7.10.14
rocket.chatrocket.chat
8.0.0 ≤
𝑥
< 8.0.8
rocket.chatrocket.chat
8.1.0 ≤
𝑥
< 8.1.7
rocket.chatrocket.chat
8.2.0 ≤
𝑥
< 8.2.7
rocket.chatrocket.chat
8.3.0 ≤
𝑥
< 8.3.7
rocket.chatrocket.chat
8.4.0 ≤
𝑥
< 8.4.5
rocket.chatrocket.chat
8.5.0 ≤
𝑥
< 8.5.2
rocket.chatrocket.chat
8.6.0 ≤
𝑥
< 8.6.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/RocketChat/Rocket.Chat/pull/41233
https://hackerone.com/reports/3827674