What’s Vulnerable › Vulnerabilities

CVE-2026-2092: Keycloak-services: keycloak: unauthorized access via improper validation of encrypted saml assertions

• Severity: high (CVSS 7.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-03-18 · updated 2026-10-06
• Weakness: CWE-1287

Description

A flaw was found in Keycloak. Keycloak's Security Assertion Markup Language (SAML) broker endpoint does not properly validate encrypted assertions when the overall SAML response is not signed. An attacker with a valid signed SAML assertion can exploit this by crafting a malicious SAML response. This allows the attacker to inject an encrypted assertion for an arbitrary principal, leading to unauthorized access and potential information disclosure.

Affected products

• Red Hat build of Keycloak 26.4: from 26.2 before 26.2.14; from 26.4 before 26.4.10 — fixed in 26.2.14, 26.4.10

How to fix

Upgrade to a fixed version: Red Hat build of Keycloak 26.4 26.2.14, 26.4.10. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2026:3925
• https://access.redhat.com/errata/RHSA-2026:3926
• https://access.redhat.com/errata/RHSA-2026:3947
• https://access.redhat.com/errata/RHSA-2026:3948
• https://access.redhat.com/errata/RHSA-2026:76128
• https://access.redhat.com/errata/RHSA-2026:76129
• https://access.redhat.com/errata/RHSA-2026:76130
• https://access.redhat.com/errata/RHSA-2026:76132
• https://access.redhat.com/errata/RHSA-2026:76134
• https://access.redhat.com/security/cve/CVE-2026-2092
• https://bugzilla.redhat.com/show_bug.cgi?id=2437296
• https://access.redhat.com/errata/RHSA-2026:3925

Get alerted when CVE-2026-2092 or the next vulnerability affects your stack