CVE-2026-4282: Improper Isolation or Compartmentalization in Red Hat Red Hat build of Keycloak 26.2
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.
AI Analysis
Technical Summary
The vulnerability CVE-2026-4282 in Red Hat build of Keycloak 26.2 involves improper isolation or compartmentalization in the SingleUseObjectProvider component, which is a global key-value store. Due to lack of proper type and namespace isolation, an unauthenticated attacker can forge authorization codes. Exploiting this flaw can lead to the creation of access tokens with administrative privileges, resulting in privilege escalation. The issue affects versions before 26.2.15. Red Hat has published security advisories and released updated packages (26.2.15) to fix this vulnerability.
Potential Impact
Successful exploitation of this vulnerability allows an unauthenticated attacker to forge authorization codes, which can be used to create admin-capable access tokens. This leads to privilege escalation within the affected Keycloak server, potentially compromising authentication and authorization controls.
Mitigation Recommendations
Red Hat has released updated packages for Red Hat build of Keycloak version 26.2.15 that address this vulnerability. Users should upgrade to version 26.2.15 or later to remediate the issue. Before applying the update, it is recommended to back up existing installations, including applications, configuration files, and databases. No other mitigation or workaround is specified in the vendor advisories.
CVE-2026-4282: Improper Isolation or Compartmentalization in Red Hat Red Hat build of Keycloak 26.2
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.
CVSS v3.1
Score 7.4high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-4282 in Red Hat build of Keycloak 26.2 involves improper isolation or compartmentalization in the SingleUseObjectProvider component, which is a global key-value store. Due to lack of proper type and namespace isolation, an unauthenticated attacker can forge authorization codes. Exploiting this flaw can lead to the creation of access tokens with administrative privileges, resulting in privilege escalation. The issue affects versions before 26.2.15. Red Hat has published security advisories and released updated packages (26.2.15) to fix this vulnerability.
Potential Impact
Successful exploitation of this vulnerability allows an unauthenticated attacker to forge authorization codes, which can be used to create admin-capable access tokens. This leads to privilege escalation within the affected Keycloak server, potentially compromising authentication and authorization controls.
Mitigation Recommendations
Red Hat has released updated packages for Red Hat build of Keycloak version 26.2.15 that address this vulnerability. Users should upgrade to version 26.2.15 or later to remediate the issue. Before applying the update, it is recommended to back up existing installations, including applications, configuration files, and databases. No other mitigation or workaround is specified in the vendor advisories.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-03-16T15:53:24.993Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/errata/RHSA-2026:6475","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:6476","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:6477","vendor":"Red Hat"},{"url":"https://access.redhat.com/errata/RHSA-2026:6478","vendor":"Red Hat"},{"url":"https://access.redhat.com/security/cve/CVE-2026-4282","vendor":"Red Hat"}]
Threat ID: 69ce6a44e6bfc5ba1dd993a7
Added to database: 04/02/2026, 13:08:20 UTC
Last enriched: 07/15/2026, 09:25:07 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 280
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.