AUGUST 4, 2026
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Case File

CVE-2026-4634

HIGH · CVSS 7.5 EPSS 0.52% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2026-04-02 · Last synced 2026-08-04

CyberRota Analysis

This is a high severity vulnerability with a CVSS score of 7.5. Public exploit code or proof-of-concept references have been detected in its references. Exploitation may require the attacker to be authenticated. It may lead to a denial-of-service condition.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Detected Signals
exploit

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-4634
Severity
HIGH
CVSS
7.5
EPSS
0.52%

Original NVD 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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)