CVE-2026-3872
Published:April 02, 2026
Updated:April 20, 2026
A flaw was found in Keycloak. This issue allows an attacker, who controls another path on the same web server, to bypass the allowed path in redirect Uniform Resource Identifiers (URIs) that use a wildcard. A successful attack may lead to the theft of an access token, resulting in information disclosure.
Affected Packages
https://github.com/keycloak/keycloak.git (GITHUB):
Affected version(s) >=26.4.0 <26.4.11Fix Suggestion:
Update to version 26.4.11https://github.com/keycloak/keycloak.git (GITHUB):
Affected version(s) >=26.5.0 <26.5.7Fix Suggestion:
Update to version 26.5.7https://github.com/keycloak/keycloak.git (GITHUB):
Affected version(s) >=26.2.0 <26.2.15Fix Suggestion:
Update to version 26.2.15org.keycloak:keycloak-services (JAVA):
Affected version(s) >=26.5.0 <26.5.7Fix Suggestion:
Update to version 26.5.7org.keycloak:keycloak-services (JAVA):
Affected version(s) >=1.0-alpha-1 <26.5.7Fix Suggestion:
Update to version 26.5.7Related Resources (10)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.5
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
PASSIVE
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:
7.3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
URL Redirection to Untrusted Site ('Open Redirect')
EPSS
Base Score:
0.03
