CVE-2025-11537 — Keycloak-services: sensitive headers shown in the http access logs
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 Aut…
Published: 2026-02-10 · CVSS: 5.0 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7