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CVE PROGRAM SOURCE RECORD6.4 Medium

CVE-2026-9087

Keycloak: cross-session email verification proof not bound to upstream identity in first-broker-login

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Status
Published
Published
Updated
Assigning organization
redhat

Description

A flaw was found in Keycloak. The cross-session verification proof is keyed only by (local userId, idpAlias) and is not bound to the upstream identity that was actually verified, so a second upstream account on the same IdP can consume it and get linked to the victim's local account.

Affected products

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

Red Hat Red Hat build of Keycloak 26.4

Default version status: affected

  • 26.4.13-1 to < *unaffected

Red Hat Red Hat build of Keycloak 26.4

Default version status: affected

  • 26.4-19 to < *unaffected

Red Hat Red Hat build of Keycloak 26.4

Default version status: affected

  • 26.4-19 to < *unaffected

Red Hat Red Hat build of Keycloak 26.4.13

Default version status: unaffected

Red Hat Red Hat build of Keycloak 26.6

Default version status: affected

  • 26.6.3-3 to < *unaffected

Red Hat Red Hat build of Keycloak 26.6

Default version status: affected

  • 26.6-6 to < *unaffected

Red Hat Red Hat build of Keycloak 26.6

Default version status: affected

  • 26.6-6 to < *unaffected

Red Hat Red Hat build of Keycloak 26.6.3

Default version status: unaffected

References