Quick answers
- Is CVE-2026-107124 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-107124 being exploited in the wild.
- How severe is CVE-2026-107124?
- Medium severity, with a CVSS score of 6.4, published 6 November 2026.
- Which products and versions are affected?
- Red Hat Build of Keycloak.
- Is there a fix for CVE-2026-107124?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-107124 attacked?
- It is attacked over the network, in a hosted service.
- Am I affected by CVE-2026-107124?
- Check whether you run Red Hat build of Keycloak. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability is a session fixation flaw (CWE-384) in the keycloak-services component's OIDC logout endpoint. An attacker can set a session cookie based on an unvalidated id_token_hint parameter before security checks complete, then trick a victim into visiting a crafted URL during a specific timing window to bind their login to the attacker-controlled session ID, leading to account takeover.
Affected products
- Red Hat Build of Keycloak
Timeline
- 2026-11-06: disclosed