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CVE-2025-11537— Keycloak-services: sensitive headers shown in the http access logs

Quick assessment

Affected
Red Hat Red Hat Build of Keycloak
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Keycloak是Keycloak开源的一种开源身份和访问管理解决方案。 Keycloak存在安全漏洞，该漏洞源于当日志格式配置为详细用户提供模式时，敏感标头会以明文形式泄露到日志中，可能导致具有日志文件读取权限的攻击者提取凭据并冒充用户，造成账户完全接管。

CVSS 5.0 · Medium EPSS 0.15% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
Red Hat Red Hat Build of Keycloak any affected
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I. Basic Information for CVE-2025-11537

Vulnerability Information
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Vulnerability Title
Keycloak-services: sensitive headers shown in the http access logs
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak. When the logging format is configured to a verbose, user-supplied pattern (such as the pre-defined 'long' pattern), sensitive headers including Authorization and Cookie are disclosed to the logs in cleartext. An attacker with read access to the log files can extract these credentials (e.g., bearer tokens, session cookies) and use them to impersonate users, leading to a full account compromise.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
日志输出的转义处理不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Keycloak 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak开源的一种开源身份和访问管理解决方案。 Keycloak存在安全漏洞，该漏洞源于当日志格式配置为详细用户提供模式时，敏感标头会以明文形式泄露到日志中，可能导致具有日志文件读取权限的攻击者提取凭据并冒充用户，造成账户完全接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Build of Keycloak - cpe:/a:redhat:build_keycloak:

II. Public POCs for CVE-2025-11537

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III. Intelligence Information for CVE-2025-11537

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IV. Related Vulnerabilities

Same product: Red Hat Build of Keycloak
Same vendor: Red Hat
Same weakness: CWE-117

V. Comments for CVE-2025-11537

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