Vulnerability DatabaseCVE-2026-92855
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CVE-2026-92855
Published:November 05, 2026
Updated:November 09, 2026
A flaw was found in the SAML identity broker component of Keycloak, which is used to delegate authentication to external identity providers. The issue occurs because the broker fails to verify that a user actually possesses the private key associated with a holder-of-key assertion. An attacker who intercepts a victim signed assertion can replay it to gain unauthorized access and impersonate the victim without needing their private key.
Affected Packages
https://github.com/keycloak/keycloak.git (GITHUB):
Affected version(s) >=1.2.0.Beta1 <26.8.2 || >=2.0.0.CR1 <26.8.2 || >=3.0.0.CR1 <26.8.2 || >=4.0.0.Beta1 <26.8.2 || =5.0.0 <26.8.2 || >=6.0.0 <26.8.2 || >=7.0.0 <26.8.2 || >=8.0.0 <26.8.2 || >=9.0.0 <26.8.2 || >=10.0.0 <26.8.2 || >=11.0.0 <26.8.2 || >=12.0.0 <26.8.2 || >=13.0.0 <26.8.2 || =14.0.0 <26.8.2 || >=15.0.0 <26.8.2 || >=16.0.0 <26.8.2 || >=17.0.0 <26.8.2 || >=18.0.0 <26.8.2 || >=19.0.0 <26.8.2 || >=20.0.0 <26.8.2 || >=21.0.0 <26.8.2 || >=22.0.0 <26.8.2 || >=23.0.0 <26.8.2 || >=24.0.0 <26.8.2 || >=25.0.0 <26.8.2 || >=26.7.0 <26.8.2
Fix Suggestion:
Update to version 26.8.2
https://github.com/keycloak/keycloak.git (GITHUB):
Affected version(s) >=26.5.0 <26.6.8
Fix Suggestion:
Update to version 26.6.8
https://github.com/keycloak/keycloak.git (GITHUB):
Affected version(s) >=26.0.0 <26.4.17
Fix Suggestion:
Update to version 26.4.17
org.keycloak:keycloak-services (JAVA):
Affected version(s) >=4.0.0.Beta1 <26.8.2 || >=18.0.0 <26.8.2 || >=20.0.0 <26.8.2 || >=19.0.0 <26.8.2 || >=16.0.0 <26.8.2 || >=26.7.0 <26.8.2 || >=13.0.0 <26.8.2 || >=11.0.0 <26.8.2 || >=9.0.0 <26.8.2 || >=23.0.0 <26.8.2 || >=12.0.0 <26.8.2 || >=10.0.0 <26.8.2 || >=21.0.0 <26.8.2 || >=22.0.0 <26.8.2 || >=3.0.0.CR1 <26.8.2 || >=15.0.0 <26.8.2 || =14.0.0 <26.8.2 || >=17.0.0 <26.8.2 || >=25.0.0 <26.8.2 || =5.0.0 <26.8.2 || >=8.0.0 <26.8.2 || >=1.9.0.CR1 <26.8.2 || >=6.0.0 <26.8.2 || >=7.0.0 <26.8.2 || >=24.0.0 <26.8.2 || >=2.0.0.CR1 <26.8.2
Fix Suggestion:
Update to version 26.8.2
org.keycloak:keycloak-services (JAVA):
Affected version(s) >=26.5.0 <26.6.8.redhat-00002
Fix Suggestion:
Update to version 26.6.8.redhat-00002
org.keycloak:keycloak-services (JAVA):
Affected version(s) >=26.0.0 <26.4.17.redhat-00002
Fix Suggestion:
Update to version 26.4.17.redhat-00002
Related Resources (6)
https://bugzilla.redhat.com/show_bug.cgi?id=2535814
https://access.redhat.com/errata/RHSA-2026:95759
https://access.redhat.com/security/cve/CVE-2026-92855
https://access.redhat.com/errata/RHSA-2026:95762
https://access.redhat.com/errata/RHSA-2026:95761
https://access.redhat.com/errata/RHSA-2026:95760
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CVSS v4
Base Score:
9.1
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Authentication
CWE-287
EPSS
Base Score:
0.41