GHSA-rg35-5v25-mqvp
Keycloak vulnerable to session takeovers due to reuse of session identifiers
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Maven | org.keycloak:keycloak-services | < 26.0.0 | 26.0.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
A flaw was found in Keycloak. In Keycloak where a user can accidentally get access to another user's session if both use the same device and browser. This happens because Keycloak sometimes reuses session identifiers and doesn’t clean up properly during logout when browser cookies are missing. As a result, one user may receive tokens that belong to another user.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2025-12390
- https://github.com/keycloak/keycloak/issues/32197
- https://github.com/keycloak/keycloak/issues/43853
- https://github.com/keycloak/keycloak/commit/5344aada5ee06b02ec3a9e0f52fa381d085b6282
- https://github.com/keycloak/keycloak/commit/b46fab230824a2304daafe74be019e8bd4ee590a
- https://github.com/keycloak/keycloak/commit/d82438a611f2f869f1966c13012953fe963a493d
- https://github.com/keycloak/keycloak/commit/ef75a4dc50aa9459777494e4b88655100bf2ac80
- https://access.redhat.com/errata/RHSA-2025:21370
- https://access.redhat.com/errata/RHSA-2025:21371
- https://access.redhat.com/errata/RHSA-2025:22088
- https://access.redhat.com/errata/RHSA-2025:22089
- https://access.redhat.com/security/cve/CVE-2025-12390
- https://bugzilla.redhat.com/show_bug.cgi?id=2406793
- https://github.com/keycloak/keycloak
- https://github.com/keycloak/keycloak/discussions/31265