SB2026091054 - Multiple vulnerabilities in Keycloak

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Main Vulnerability Database SB2026091054

SB2026091054 - Multiple vulnerabilities in Keycloak

Published: September 10, 2026

Security Bulletin ID SB2026091054
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Partial DoS

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Uncontrolled Recursion (CVE-ID: CVE-2025-48924)

CWE-ID: CWE-674 - Uncontrolled Recursion

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to the methods ClassUtils.getClass(...) can throw StackOverflowError on very long inputs. Because an Error is usually not handled by applications and libraries, a StackOverflowError could cause an application to stop. A remote attacker can trigger uncontrolled recursion and perform a denial of service (DoS) attack.


2) Command Injection (CVE-ID: CVE-2025-7962)

CWE-ID: CWE-77 - Command injection

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary SMTP commands on the system.

The vulnerability exists due to insufficient input validation when handling CR-LF characters in UTF-8 encoding. A remote attacker can pass specially crafted input to the application and execute arbitrary SMTP commands on the server.


Remediation

Install update from vendor's website.

References