CVE-2026-1190 Details
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.
A vulnerability exists in Keycloak's SAML brokering feature. When Keycloak acts as a client in a SAML configuration, it does not properly validate the 'NotOnOrAfter' timestamp in the 'SubjectConfirmationData'. This oversight allows an attacker to prolong the validity of SAML responses, potentially leading to longer-than-expected session times or increased resource usage.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jan 26, 2026CISA-ADP
Assessed Jan 26, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://access.redhat.com/errata/RHSA-2026:3947 | [email protected] | |
| https://access.redhat.com/errata/RHSA-2026:3948 | [email protected] | |
| https://access.redhat.com/security/cve/CVE-2026-1190 | [email protected] | AdvisoryVendor |
| https://bugzilla.redhat.com/show_bug.cgi?id=2430835 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-112 | Missing XML Validation | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Red Hat Keycloak | All versions |
CPE
Remediation
| |
| Red Hat Enterprise Application Platform | All versions |
CPE
Remediation
| |
| Red Hat Single Sign-On | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 5, 2026 | CVE Modified | [email protected] |
| Jan 26, 2026 | New CVE Received | [email protected] |