Description
A flaw was found in Keycloak's SAML brokering functionality. When Keycloak is configured as a client in a Security Assertion Markup Language (SAML) setup, it fails to validate the `NotOnOrAfter` timestamp within the `SubjectConfirmationData`. This allows an attacker to delay the expiration of SAML responses, potentially extending the time a response is considered valid and leading to unexpected session durations or resource consumption.
Metrics
CVSS 3.1 3.1/10
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat build of Keycloak 26.4 | — |
| Red Hat | Red Hat build of Keycloak 26.4 | — |
| Red Hat | Red Hat build of Keycloak 26.4 | — |
| Red Hat | Red Hat build of Keycloak 26.4.10 | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | — |
| Red Hat | Red Hat Single Sign-On 7 | — |
References
Timeline
- Published
- Jan 26, 2026
- Last modified
- Jun 17, 2026
- NVD status
- Deferred