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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-7507

Org.keycloak/keycloak-services: session fixation in oidc login flow that can lead to account takeover

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Status
Published
Published
Updated
Assigning organization
redhat

Description

A session fixation vulnerability was found in Keycloak's login-actions endpoints. An unauthenticated attacker could exploit this flaw by pre-creating an authentication session and tricking a victim into visiting a maliciously crafted link. By leveraging the /login-actions/restart endpoint—which processes session handles without adequate CSRF protection or cookie ownership validation—an attacker can reset the authentication flow state. This causes Single Sign-On (SSO) to authenticate the victim transparently upon clicking the link, allowing the attacker to hijack the required-action form without needing the victim's credentials. A successful exploit could lead to complete account takeover, including highly privileged administrative accounts.

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 26.2

Default version status: affected

  • 26.2.16-1 to < *unaffected

Red Hat Red Hat build of Keycloak 26.2

Default version status: affected

  • 26.2-21 to < *unaffected

Red Hat Red Hat build of Keycloak 26.2

Default version status: affected

  • 26.2-21 to < *unaffected

Red Hat Red Hat build of Keycloak 26.2.16

Default version status: unaffected

Red Hat Red Hat build of Keycloak 26.4

Default version status: affected

  • 26.4.12-1 to < *unaffected

Red Hat Red Hat build of Keycloak 26.4

Default version status: affected

  • 26.4-17 to < *unaffected

Red Hat Red Hat build of Keycloak 26.4

Default version status: affected

  • 26.4-17 to < *unaffected

Red Hat Red Hat build of Keycloak 26.4.12

Default version status: unaffected

Red Hat Red Hat Single Sign-On 7.6.13

Default version status: unaffected

Red Hat Red Hat Single Sign-On 7.6 for RHEL 7

Default version status: affected

  • 0:18.0.20-1.redhat_00001.1.el7sso to < *unaffected

Red Hat Red Hat Single Sign-On 7.6 for RHEL 8

Default version status: affected

  • 0:18.0.20-1.redhat_00001.1.el8sso to < *unaffected

Red Hat Red Hat Single Sign-On 7.6 for RHEL 9

Default version status: affected

  • 0:18.0.20-1.redhat_00001.1.el9sso to < *unaffected

Red Hat RHEL-8 based Middleware Containers

Default version status: affected

  • 7.6-85 to < *unaffected

References