CVE-2025-3501

Org.keycloak.protocol.services: keycloak hostname verification

State: Published
Severity: 8.2 High
Published: Apr 29, 2025
Updated: Sep 21, 2026
Reserved: Apr 10, 2025

Description

A flaw was found in Keycloak. By setting a verification policy to 'ALL', the trust store certificate verification is skipped, which is unintended.

Scores

CVSS	Score	Vector	Source
3.1	8.2 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N	redhat

Weaknesses

CWE-297 Improper Validation of Certificate with Host Mismatch

Affected Products

Product	Versions
keycloak	25.0.0 to before 25.Affected 26.0.0 to before 26.0.11Affected 26.1.0 to before 26.1.Unknown 26.2.0 to before 26.2.2Affected
Red Hat Build of KeycloakRed Hat
Red Hat build of Keycloak 26Red Hat
Red Hat build of Keycloak 26.0Red Hat	26.0.11-2 and laterNot affected
Red Hat build of Keycloak 26.0Red Hat	26.0-12 and laterNot affected
Red Hat build of Keycloak 26.0Red Hat	26.0-13 and laterNot affected
Red Hat build of Keycloak 26.2Red Hat	26.2.5-1 and laterNot affected
Red Hat build of Keycloak 26.2Red Hat	26.2-4 and laterNot affected
Red Hat build of Keycloak 26.2Red Hat	26.2-4 and laterNot affected
Red Hat Single Sign-On 7Red Hat

References

RHSA-2025:4335vendor-advisory
RHSA-2025:4336vendor-advisory
RHSA-2025:8672vendor-advisory
RHSA-2025:8690vendor-advisory
https://access.redhat.com/security/cve/CVE-2025-3501vdb-entry
RHBZ#2358834issue-tracking
https://github.com/keycloak/keycloak/issues/39350
https://github.com/keycloak/keycloak/pull/39366

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