CVE-2026-1190
Low
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.
SeverityLow
CVSS3.1
Exploit probability—
ProductOrg.keycloak:keycloak-services
PublishedJan 26, 2026
First seenJan 26, 2026
Weakness typeCWE-112CWE-112
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| org.keycloak:keycloak-servicesMaven | v ≤ 26.5.2 | — |
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