CVEvulnerability
CVE-2026-9087
8.1 HIGH
Official page ↗
- Status
- Modified
- Published
- 2026-05-20
- Last modified
- 2026-07-23
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 6.4 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
- CVSS 3.1 ([email protected])
- 8.1 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
- Weaknesses
- CWE-639
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 configurations
• redhat build of keycloak
Related
Weakness · CWE (1)
- CWE-639 Authorization Bypass Through User-Controlled Key weakness
References
- https://access.redhat.com/errata/RHSA-2026:25097 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:25098 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:30049 access.redhat.com
- https://access.redhat.com/errata/RHSA-2026:30050 access.redhat.com
- https://access.redhat.com/security/cve/CVE-2026-9087 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2480172 Issue Tracking, Vendor Advisory