# CVE-2026-103112: Keycloak authentication session handling race condition

Source: https://junglewise.ai/threats/cve-2026-103112-a-flaw-was-found-in-the-authentication-session-handling-of-the  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-05. Updated: 2026-11-05  
License: CC BY 4.0 with a link back

CVE-2026-103112 · Severity: high · CVSS 7.5 · Published 2026-11-05

Keycloak is an identity and access management system that handles user authentication and authorization for enterprise applications. A flaw in how Keycloak manages authentication sessions allows an authenticated attacker to exploit a race condition during credential reset to take over another user's account, including changing their password and accessing their data. Successful exploitation requires difficult timing conditions and specific realm configurations.

## Quick answers

**Is CVE-2026-103112 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-103112 being exploited in the wild.

**How severe is CVE-2026-103112?** High severity, with a CVSS score of 7.5, published 5 November 2026.

**Which products and versions are affected?** Keycloak.

**Is there a fix for CVE-2026-103112?** 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-2026-103112 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-103112?** Check whether you run 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 keycloak-services component fails to verify that an authenticator is valid for the current authentication flow when switching between standard authentication and reset credentials paths. An authenticated attacker can trigger a race condition during credential reset to associate their authentication state with another user's session, bypassing access controls. This is a CWE-362 concurrent execution vulnerability requiring low privilege, network access, but high attack complexity due to the race condition requirement.

## Affected products

- Keycloak

## Timeline

- 2026-11-05: disclosed

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/security/cve/CVE-2026-103112](https://access.redhat.com/security/cve/CVE-2026-103112)