Description
A flaw was found in Keycloak. An unauthenticated attacker can exploit this vulnerability by sending a specially crafted POST request with an excessively long scope parameter to the OpenID Connect (OIDC) token endpoint. This leads to high resource consumption and prolonged processing times, ultimately resulting in a Denial of Service (DoS) for the Keycloak server.
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| build-of-keycloak | โ | โ |
| org.keycloak:keycloak-services | โ | 26.5.7 |
References
Similar Threats
- Medium CVE-2026-37978
- Low CVE-2026-37977
- Medium CVE-2026-3121
- Medium CVE-2026-3190
- Medium CVE-2026-2575
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