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Vendor Workaround
To mitigate this issue, configure the JDBC connection string for MySQL/MariaDB to explicitly set `useAffectedRows=true`. This ensures the database driver correctly reports affected rows, preventing the replay protection bypass. This mitigation is applicable only when Keycloak is deployed in stateless mode and utilizes MySQL or MariaDB as its database. A restart of the Keycloak service will be required for the configuration change to take effect.
Tracking
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Tue, 22 Sep 2026 19:30:00 +0000
| Type | Values Removed | Values Added |
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| References |
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Tue, 22 Sep 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
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| Title | Keycloak: Replay protection bypass leads to unauthorized access via database driver semantics mismatch | Keycloak-services: keycloak: replay protection bypass leads to unauthorized access via database driver semantics mismatch |
| First Time appeared |
Redhat
Redhat build Keycloak |
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| CPEs | cpe:/a:redhat:build_keycloak: | |
| Vendors & Products |
Redhat
Redhat build Keycloak |
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| References |
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Mon, 21 Sep 2026 22:30:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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Fri, 18 Sep 2026 07:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Keycloak
Keycloak keycloak |
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| Vendors & Products |
Keycloak
Keycloak keycloak |
Thu, 17 Sep 2026 19:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | keycloak-services: Keycloak: Replay protection bypass leads to unauthorized access via database driver semantics mismatch | Keycloak: Replay protection bypass leads to unauthorized access via database driver semantics mismatch |
| References |
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Thu, 17 Sep 2026 12:15:00 +0000
| Type | Values Removed | Values Added |
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| Description | A flaw was found in Keycloak. When deployed in stateless mode with MySQL or MariaDB, a mismatch in row-count semantics between the database driver and Keycloak's application logic allows an attacker to bypass replay protection. This vulnerability enables an attacker who intercepts single-use security artifacts, such as JWT client assertions, DPoP proofs, or one-time password (TOTP) codes, to replay them. Successful exploitation grants unauthorized access to the token endpoint or login flow. | |
| Title | keycloak-services: Keycloak: Replay protection bypass leads to unauthorized access via database driver semantics mismatch | |
| Weaknesses | CWE-294 | |
| References |
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| Metrics |
threat_severity
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cvssV3_1
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-09-25T06:42:50.534Z
Reserved: 2026-09-14T14:53:37.815Z
Link: CVE-2026-90997
Updated: 2026-09-21T21:07:48.577Z
Status : Awaiting Analysis
Published: 2026-09-17T19:17:06.740
Modified: 2026-09-22T19:16:56.183
Link: CVE-2026-90997
OpenCVE Enrichment
Updated: 2026-09-18T07:30:05Z
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CWE-294
Authentication Bypass by Capture-replay