CVE-2026-2092

Summary

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 Software

VendorProductVersion RangeStatus
Red HatRed Hat build of Keycloak 26.226.2.14-1 < *unaffected
Red HatRed Hat build of Keycloak 26.226.2-16 < *unaffected
Red HatRed Hat build of Keycloak 26.226.2-16 < *unaffected
Red HatRed Hat build of Keycloak 26.426.4.10-1 < *unaffected
Red HatRed Hat build of Keycloak 26.426.4-12 < *unaffected
Red HatRed Hat build of Keycloak 26.426.4-12 < *unaffected

Weaknesses

  • CWE-1287: Improper Validation of Specified Type of Input

Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

keycloak-services: Keycloak: Unauthorized access via improper validation of encrypted SAML assertions

Additional References

References