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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2025-11419

Keycloak: keycloak tls client-initiated renegotiation denial of service

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Status
Published
Published
Updated
Assigning organization
redhat

Description

A flaw was found in Keycloak. This vulnerability allows an unauthenticated remote attacker to cause a denial of service (DoS) by repeatedly initiating TLS 1.2 client-initiated renegotiation requests to exhaust server CPU resources, making the service unavailable.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

keycloak

Default version status: unaffected

  • 0 to < 26.0.16affected
  • 26.1.0 to < 26.1.*unknown
  • 26.2.0 to < 26.2.10affected
  • 26.3.0 to < 26.3.*unknown
  • 26.4.0 to < 26.4.1affected

Red Hat Red Hat build of Keycloak 26.0

Default version status: affected

  • 26.0.16-2 to < *unaffected

Red Hat Red Hat build of Keycloak 26.0

Default version status: affected

  • 26.0-20 to < *unaffected

Red Hat Red Hat build of Keycloak 26.0

Default version status: affected

  • 26.0-21 to < *unaffected

Red Hat Red Hat build of Keycloak 26.0.16

Default version status: unaffected

Red Hat Red Hat build of Keycloak 26.2

Default version status: affected

  • 26.2.10-2 to < *unaffected

Red Hat Red Hat build of Keycloak 26.2

Default version status: affected

  • 26.2-11 to < *unaffected

Red Hat Red Hat build of Keycloak 26.2

Default version status: affected

  • 26.2-11 to < *unaffected

Red Hat Red Hat build of Keycloak 26.2.10

Default version status: unaffected

References