CVE-2026-4282
Java vulnerability analysis and mitigation

A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. This vulnerability allows an unauthenticated attacker to forge authorization codes. Successful exploitation can lead to the creation of admin-capable access tokens, resulting in privilege escalation.


SourceNVD

Related Java vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-4636HIGH8.1
  • JavaJava
  • keycloak-fips-26.5
NoYesApr 02, 2026
GHSA-2m67-wjpj-xhg9HIGH7.5
  • JavaJava
  • tools.jackson.core:jackson-core
NoNoApr 04, 2026
CVE-2026-4634HIGH7.5
  • JavaJava
  • org.keycloak:keycloak-services
NoYesApr 02, 2026
CVE-2026-4282HIGH7.4
  • JavaJava
  • keycloak-fips-26.5
NoYesApr 02, 2026
CVE-2026-4325MEDIUM5.3
  • JavaJava
  • org.keycloak:keycloak-services
NoYesApr 02, 2026

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