CVE-2025-11537

MediumCVSS 5.0/10Last modified Oct 30, 2026

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.

Metrics

CVSS 3.1 5.0/10CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-117

Affected software

Vendor	Product	Versions
Red Hat	Red Hat build of Keycloak 26.4.2	—
Red Hat	Red Hat Build of Keycloak	—

References

Timeline

Published: Feb 10, 2026
Last modified: Oct 30, 2026
NVD status: Deferred

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