low3.1
CVE-2026-1190
Keycloak's missing timestamp validation allows attackers to extend SAML response validity periods
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.keycloak:keycloak-services | <= 26.5.2 | none recorded |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://access.redhat.com/errata/RHSA-2026:3947
- https://access.redhat.com/errata/RHSA-2026:3948
- https://access.redhat.com/security/cve/CVE-2026-1190
- https://bugzilla.redhat.com/show_bug.cgi?id=2430835
- https://github.com/advisories/GHSA-63v5-26vq-m4vm
- https://nvd.nist.gov/vuln/detail/CVE-2026-1190
- https://github.com/keycloak/keycloak/issues/45646