CVE-2026-1190
LOWKeycloak - SAML Response Expiration Bypass via Missing NotOnOrAfter Validation
Title source: llmDescription
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.
References (4)
Core 4
Core References
Vendor Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2026:3947
Vendor Advisory vendor-advisory
x_refsource_redhat
https://access.redhat.com/errata/RHSA-2026:3948
Vendor Advisory vdb-entry
x_refsource_redhat
https://access.redhat.com/security/cve/CVE-2026-1190
Issue Tracking issue-tracking
x_refsource_redhat
https://bugzilla.redhat.com/show_bug.cgi?id=2430835
Scores
CVSS v3
3.1
EPSS
0.0002
EPSS Percentile
5.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-112
Status
published
Products (7)
org.keycloak/keycloak-services
0Maven
Red Hat/Red Hat build of Keycloak 26.4
26.4-12
Red Hat/Red Hat build of Keycloak 26.4
26.4.10-1
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
Published
Jan 26, 2026
Tracked Since
Feb 18, 2026