CVE-2026-90997
7.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Keycloak | Keycloak | 26.7.0 < 26.7.4 | affected |
Weaknesses
- CWE-294: CWE-294 Authentication Bypass by Capture-replay
References
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