# CVE-2026-4282

## Summary

- **CVE ID:** CVE-2026-4282
- **Severity:** HIGH
- **CVSS Score:** 7.4 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)
- **CWE:** CWE-653
- **Published:** Apr 2, 2026
- **Last Modified:** Jul 15, 2026

## Description

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 Products

- Red Hat — Red Hat build of Keycloak 26.2 (26.2.15-1)
- Red Hat — Red Hat build of Keycloak 26.2 (26.2-18)
- Red Hat — Red Hat build of Keycloak 26.4 (26.4.11-1)
- Red Hat — Red Hat build of Keycloak 26.4 (26.4-14)

## References

- [CNA](https://access.redhat.com/errata/RHSA-2026:6475)
- [CNA](https://access.redhat.com/errata/RHSA-2026:6476)
- [CNA](https://access.redhat.com/errata/RHSA-2026:6477)
- [CNA](https://access.redhat.com/errata/RHSA-2026:6478)
- [CNA](https://access.redhat.com/security/cve/CVE-2026-4282)
- [CNA](https://bugzilla.redhat.com/show_bug.cgi?id=2448061)
- [redhat-SADP](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4282.json)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.43%
- **EPSS Percentile:** 35.8

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._