CVE-2026-4282

Name: CVE-2026-4282
Creator: NVD / NIST
Published: 2026-04-02T13:16:26.68+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2026-4282 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. A flaw was found in Keycloak. The SingleUseObjectProvider, a global key-value store, lacks proper type and namespace isolation. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.4/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

EPSS Probability

0.41%

33.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-653

Affected Software

Vendor	Product	Versions
Redhat	Build Of Keycloak	All versions
Redhat	Build Of Keycloak	26.2
Redhat	Build Of Keycloak	26.2.15
Redhat	Build Of Keycloak	26.4
Redhat	Build Of Keycloak	26.4.11

References

https://access.redhat.com/errata/RHSA-2026:6475Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:6476Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:6477Vendor Advisory
https://access.redhat.com/errata/RHSA-2026:6478Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-4282Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2448061Issue Tracking, Vendor Advisory

Timeline

Published: Apr 2, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-4282?

How severe is CVE-2026-4282?

CVE-2026-4282 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2026-4282?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-4282?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST