CVE-2025-11537
Keycloak-server: sensitive headers shown in the http access logs
CVSS Score
5.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-117 |
| Vendor | red hat |
| Product | red hat build of keycloak |
| Published | Feb 10, 2026 |
| Last Updated | Feb 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
Red Hat / Red Hat Build of Keycloak
All versions affected