Improper Output Neutralization for Logs Affecting keycloak-fips-26.5 package, versions <26.5.6-r4


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.15% (4th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-KEYCLOAKFIPS265-15991294
  • published12 Apr 2026
  • disclosed10 Feb 2026

Introduced: 10 Feb 2026

CVE-2025-11537  (opens in a new tab)
CWE-117  (opens in a new tab)

How to fix?

Upgrade Chainguard keycloak-fips-26.5 to version 26.5.6-r4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream keycloak-fips-26.5 package and not the keycloak-fips-26.5 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1