CVE-2026-4282

Summary

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.

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat build of Keycloak 26.226.2.15-1 < *unaffected
Red HatRed Hat build of Keycloak 26.226.2-18 < *unaffected
Red HatRed Hat build of Keycloak 26.226.2-18 < *unaffected
Red HatRed Hat build of Keycloak 26.426.4.11-1 < *unaffected
Red HatRed Hat build of Keycloak 26.426.4-14 < *unaffected
Red HatRed Hat build of Keycloak 26.426.4-14 < *unaffected

Weaknesses

  • CWE-653: Improper Isolation or Compartmentalization

Workarounds

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

keycloak: Keycloak: Privilege escalation via forged authorization codes due to SingleUseObjectProvider isolation flaw

Additional References

References