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Vulnerability Details :

CVE-2026-1190

Summary
Assigner-redhat
Assigner Org ID-53f830b8-0a3f-465b-8143-3b8a9948e749
Published At-26 Jan, 2026 | 19:36
Updated At-06 Mar, 2026 | 03:31
Rejected At-
Credits

Org.keycloak/keycloak-services: keycloak saml brokering: response delay due to unchecked notonorafter in subjectconfirmationdata

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:redhat
Assigner Org ID:53f830b8-0a3f-465b-8143-3b8a9948e749
Published At:26 Jan, 2026 | 19:36
Updated At:06 Mar, 2026 | 03:31
Rejected At:
▼CVE Numbering Authority (CNA)
Org.keycloak/keycloak-services: keycloak saml brokering: response delay due to unchecked notonorafter in subjectconfirmationdata

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 Products
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat build of Keycloak 26.4
Collection URL
https://catalog.redhat.com/software/containers/
Package Name
rhbk/keycloak-operator-bundle
CPEs
  • cpe:/a:redhat:build_keycloak:26.4::el9
Default Status
affected
Versions
Unaffected
  • From 26.4.10-1 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat build of Keycloak 26.4
Collection URL
https://catalog.redhat.com/software/containers/
Package Name
rhbk/keycloak-rhel9
CPEs
  • cpe:/a:redhat:build_keycloak:26.4::el9
Default Status
affected
Versions
Unaffected
  • From 26.4-12 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat build of Keycloak 26.4
Collection URL
https://catalog.redhat.com/software/containers/
Package Name
rhbk/keycloak-rhel9-operator
CPEs
  • cpe:/a:redhat:build_keycloak:26.4::el9
Default Status
affected
Versions
Unaffected
  • From 26.4-12 before * (rpm)
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat build of Keycloak 26.4.10
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
rhbk/keycloak-rhel9
CPEs
  • cpe:/a:redhat:build_keycloak:26.4::el9
Default Status
unaffected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat JBoss Enterprise Application Platform 8
Collection URL
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
Package Name
keycloak-services
CPEs
  • cpe:/a:redhat:jboss_enterprise_application_platform:8
Default Status
affected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat JBoss Enterprise Application Platform Expansion Pack
Collection URL
https://access.redhat.com/jbossnetwork/restricted/listSoftware.html
Package Name
keycloak-services
CPEs
  • cpe:/a:redhat:jbosseapxp
Default Status
affected
Vendor
Red Hat, Inc.Red Hat
Product
Red Hat Single Sign-On 7
Collection URL
https://access.redhat.com/downloads/content/package-browser/
Package Name
keycloak-services
CPEs
  • cpe:/a:redhat:red_hat_single_sign_on:7
Default Status
affected
Problem Types
TypeCWE IDDescription
CWECWE-112Missing XML Validation
Type: CWE
CWE ID: CWE-112
Description: Missing XML Validation
Metrics
VersionBase scoreBase severityVector
3.13.1LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Version: 3.1
Base score: 3.1
Base severity: LOW
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Metrics Other Info
Red Hat severity rating
value:
Low
namespace:
https://access.redhat.com/security/updates/classification/
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Exploits
Credits
Red Hat would like to thank Franz Bettag (Bettag Systems) for reporting this issue.
Timeline
EventDate
Reported to Red Hat.2026-01-19 13:38:52
Made public.2026-01-19 08:08:00
Event: Reported to Red Hat.
Date: 2026-01-19 13:38:52
Event: Made public.
Date: 2026-01-19 08:08:00
Replaced By
Rejected Reason
References
HyperlinkResource
https://access.redhat.com/errata/RHSA-2026:3947
vendor-advisory
x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:3948
vendor-advisory
x_refsource_REDHAT
https://access.redhat.com/security/cve/CVE-2026-1190
vdb-entry
x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2430835
issue-tracking
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/errata/RHSA-2026:3947
Resource:
vendor-advisory
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/errata/RHSA-2026:3948
Resource:
vendor-advisory
x_refsource_REDHAT
Hyperlink: https://access.redhat.com/security/cve/CVE-2026-1190
Resource:
vdb-entry
x_refsource_REDHAT
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2430835
Resource:
issue-tracking
x_refsource_REDHAT
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:secalert@redhat.com
Published At:26 Jan, 2026 | 20:16
Updated At:05 Mar, 2026 | 22:16

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.13.1LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Type: Secondary
Version: 3.1
Base score: 3.1
Base severity: LOW
Vector:
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-112Secondarysecalert@redhat.com
CWE ID: CWE-112
Type: Secondary
Source: secalert@redhat.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://access.redhat.com/errata/RHSA-2026:3947secalert@redhat.com
N/A
https://access.redhat.com/errata/RHSA-2026:3948secalert@redhat.com
N/A
https://access.redhat.com/security/cve/CVE-2026-1190secalert@redhat.com
N/A
https://bugzilla.redhat.com/show_bug.cgi?id=2430835secalert@redhat.com
N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:3947
Source: secalert@redhat.com
Resource: N/A
Hyperlink: https://access.redhat.com/errata/RHSA-2026:3948
Source: secalert@redhat.com
Resource: N/A
Hyperlink: https://access.redhat.com/security/cve/CVE-2026-1190
Source: secalert@redhat.com
Resource: N/A
Hyperlink: https://bugzilla.redhat.com/show_bug.cgi?id=2430835
Source: secalert@redhat.com
Resource: N/A

Change History

0
Information is not available yet

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