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
Affected Vendors & Products
References
History
Tue, 10 Feb 2026 15:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Redhat build Of Keycloak
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| Vendors & Products |
Redhat build Of Keycloak
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Tue, 10 Feb 2026 15:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
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Tue, 10 Feb 2026 11:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Keycloak-server: sensitive headers shown in the http access logs | |
| First Time appeared |
Redhat
Redhat build Keycloak |
|
| Weaknesses | CWE-117 | |
| CPEs | cpe:/a:redhat:build_keycloak: | |
| Vendors & Products |
Redhat
Redhat build Keycloak |
|
| References |
| |
| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-02-10T14:32:29.177Z
Reserved: 2025-10-09T01:26:22.026Z
Link: CVE-2025-11537
Updated: 2026-02-10T14:32:23.365Z
Status : Awaiting Analysis
Published: 2026-02-10T11:16:09.397
Modified: 2026-02-10T15:22:54.740
Link: CVE-2025-11537
No data.
OpenCVE Enrichment
Updated: 2026-02-10T15:37:12Z