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Improper Authentication Affecting keycloak-fips-advanced-compat package, versions <26.6.4-r0

Severity

 Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.46% (38th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-KEYCLOAKFIPSADVANCEDCOMPAT-18474080
  • published31 Jul 2026
  • disclosed19 Jun 2026
Report a new vulnerability Found a mistake?

Introduced: 19 Jun 2026

CVE-2026-50559  (opens in a new tab)
CWE-287  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Minimos:latest keycloak-fips-advanced-compat to version 26.6.4-r0 or higher.

NVD Description

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

Quarkus is a Java framework for building cloud-native applications. Prior to versions 3.37.0, 3.36.3, 3.33.2.1, 3.33.3, 3.27.4.1, 3.27.5, and 3.20.6.2, Quarkus HTTP path-based authorization policies can be bypassed using encoded semicolons (%3B) to smuggle matrix parameters past the security layer, and using encoded slashes (%2F) or backslashes (%5C) to access protected static resources. This is a distinct issue from CVE-2026-39852, which addressed only literal semicolon stripping. Versions 3.37.0, 3.36.3, 3.33.2.1, 3.33.3, 3.27.4.1, 3.27.5, and 3.20.6.2 contain a patch.

References