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EUVD-2026-18212

🗓️ 02 Apr 2026 15:31:39Reported by EUVDType 
euvd
 euvd
🔗 euvd.enisa.europa.eu👁 1 Views

Unauthenticated attacker triggers DoS on Keycloak via long scope POST to OpenID Connect token endpoint.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-4634
2 Apr 202612:44
attackerkb
Chainguard
CVE-2026-4634 vulnerabilities
5 Apr 202601:17
cgr
Circl
CVE-2026-4634
2 Apr 202614:45
circl
CNNVD
Keycloak 安全漏洞
2 Apr 202600:00
cnnvd
CVE
CVE-2026-4634
2 Apr 202612:44
cve
Cvelist
CVE-2026-4634 Keycloak: keycloak: denial of service via excessive processing of openid connect scope parameters
2 Apr 202612:44
cvelist
Github Security Blog
Keycloak: Application-Level DoS via Scope Processing
2 Apr 202615:31
github
NVD
CVE-2026-4634
2 Apr 202613:16
nvd
OSV
CGA-X9JX-4G6W-95RC
4 Apr 202618:15
osv
OSV
GHSA-H4WV-G838-66G3 Keycloak: Application-Level DoS via Scope Processing
2 Apr 202615:31
osv
Rows per page
[
  {
    "enisaIdVendor": [
      {
        "id": "34ced955-f274-3168-9d04-73d396002d67",
        "vendor": {
          "name": "Red Hat"
        }
      }
    ]
  }
]

Data

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02 Apr 2026 15:31Current
5.9Medium risk
Vulners AI Score5.9
CVSS 3.17.5
EPSS0.00025
1