CVE-2026-58066: 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
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.
Details
Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-58066
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-580660.21% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 11% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-58066 | coverage & exploitation status | NVD · CVE.org |
More from NVD Recent CVEs
- mediumCVE-2026-18573: A flaw was found in the keycloak-services component of Keycloak, which is used for managing au…2026-08-02
- mediumCVE-2026-18572: Keycloak provides authorization services that allow administrators to restrict access to resou…2026-08-02
- mediumCVE-2026-18571: A flaw was found in the user creation component of Keycloak when Fine-Grained Admin Permission…2026-08-02
- mediumCVE-2026-18570: A flaw was found in the full-scope-disabled client-policy executor within the keycloak-service…2026-08-02
- unknownCVE-2026-16540: The Simply Schedule Appointments WordPress plugin before 1.6.12.6 does not correctly restrict …2026-08-02