SB2026091050 - Multiple vulnerabilities in Keycloak

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Main Vulnerability Database SB2026091050

SB2026091050 - Multiple vulnerabilities in Keycloak

Published: September 10, 2026

Security Bulletin ID SB2026091050
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

High 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Improper Authentication (CVE-ID: CVE-2025-49146)

CWE-ID: CWE-287 - Improper Authentication

CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to when the PostgreSQL JDBC driver is configured with channel binding set to required (default value is prefer), the driver would incorrectly allow connections to proceed with authentication methods that do not support channel binding (such as password, MD5, GSS, or SSPI authentication). A remote attacker can intercept connections that users believed were protected by channel binding requirements.


2) Exposure of Resource to Wrong Sphere (CVE-ID: CVE-2025-49574)

CWE-ID: CWE-668 - Exposure of resource to wrong sphere

CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to an error when duplicating a duplicated context. A remote user can gain access to sensitive information, such as request scope, security details, and metadata.


Remediation

Install update from vendor's website.

References