Red Hat Keycloak HTTP Access Log log file

Summaryinfo

A vulnerability labeled as problematic has been found in Red Hat Keycloak. This affects an unknown part of the component HTTP Access Log. The manipulation results in log file. This vulnerability was named CVE-2025-11537. The attack needs to be approached locally. There is no available exploit.

Detailsinfo

A vulnerability was found in Red Hat Keycloak (the affected version unknown). It has been classified as problematic. Affected is an unknown part of the component HTTP Access Log. The manipulation with an unknown input leads to a log file vulnerability. CWE is classifying the issue as CWE-532. Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information. This is going to have an impact on confidentiality. CVE summarizes:

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.

The advisory is available at bugzilla.redhat.com. This vulnerability is traded as CVE-2025-11537. The exploitability is told to be easy. Local access is required to approach this attack. Additional levels of successful authentication are necessary for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/10/2026). This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• Red Hat

Name

• Keycloak

License

• open-source

Website

• Vendor: https://www.redhat.com/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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