CVE-2025-11537 - CVE House
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Status published Medium CVE-2025-11537

Keycloak-server: sensitive headers shown in the http access logs

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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Affected Vendor

Affected Software

Red Hat Build of Keycloak
Vulnerable Versions:
Unknown

Timeline

Official Publish: February 10th, 2026
Last Modified: February 10th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

Weaknesses (CWE)

CWE-117

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.