CVE-2026-15943
Keycloak-services: keycloak-services: oidc idp update reuses masked client secret after token url change
- State
- Published
- Severity
- 5.5 Medium
- Published
- Jul 17, 2026
- Updated
- Aug 31, 2026
- Reserved
- Jul 16, 2026
Description
A flaw was found in the Keycloak keycloak-services component, which handles the management of identity providers. The issue occurs when a delegated administrator updates an OIDC identity provider using a masked client secret sentinel value. Due to improper validation, Keycloak reuses the existing real secret even if security-sensitive fields like the token URL have been changed, allowing an attacker to redirect and capture the secret.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 5.5 Medium | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:L/A:N | redhat |
Weaknesses
- CWE-1288 Improper Validation of Consistency within Input
Affected Products
| Product | Versions |
|---|---|
Red Hat Build of KeycloakRed Hat | |
Red Hat Build of KeycloakRed Hat | |
Red Hat Build of KeycloakRed Hat | |
Red Hat Data Grid 8Red Hat | |
Red Hat JBoss Enterprise Application Platform Expansion PackRed Hat | |
Red Hat Single Sign-On 7Red Hat |
References
- https://access.redhat.com/security/cve/CVE-2026-15943vdb-entry
- RHBZ#2501270issue-tracking
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