Keycloak: keycloak: privilege escalation via improper scope mapping enforcement
Summary
| CVE | CVE-2026-9795 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-28 05:16:41 UTC |
| Updated | 2026-07-15 01:17:10 UTC |
| Description | A flaw was found in Keycloak's Fine-Grained Admin Permissions (FGAPv2) feature. An administrator with limited client management permissions can exploit this vulnerability to assign any realm role, including highly privileged roles, to a client's scope mapping. This bypasses intended security controls, allowing the injected role to be projected into a user's authentication token when they access the modified client. This could lead to unauthorized privilege escalation within the Keycloak realm. |
Risk And Classification
Primary CVSS: v3.1 7.3 HIGH from ADP
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
EPSS: 0.002920000 probability, percentile 0.211720000 (date 2026-07-16)
Problem Types: CWE-266 | CWE-266 Incorrect Privilege Assignment
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | CVSS | 7.3 | HIGH | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N |
| 3.1 | [email protected] | Secondary | 7.3 | HIGH | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N |
| 3.1 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | Secondary | 7.3 | HIGH | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N |
| 3.1 | CNA | CVSS | 7.3 | HIGH | CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N |
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Redhat | Build Of Keycloak | - | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4 | unaffected 26.4.13-1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4 | unaffected 26.4-19 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4 | unaffected 26.4-19 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.4.13 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.6 | unaffected 26.6.4-2 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.6 | unaffected 26.6-8 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.6 | unaffected 26.6-8 * rpm | Not specified |
| CNA | Red Hat | Red Hat Build Of Keycloak 26.6.4 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak 26.4 | unaffected 26.4.13-1 * rpm | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak 26.4 | unaffected 26.4-19 * rpm | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak 26.4 | unaffected 26.4-19 * rpm | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak 26.4.13 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak 26.6 | unaffected 26.6.4-2 * rpm | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak 26.6 | unaffected 26.6-8 * rpm | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak 26.6 | unaffected 26.6-8 * rpm | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak 26.6.4 | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/errata/RHSA-2026:30084 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-9795.json | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | security.access.redhat.com | |
| access.redhat.com/security/cve/CVE-2026-9795 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | Mitigation, Vendor Advisory |
| access.redhat.com/errata/RHSA-2026:30050 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:30083 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:30049 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | bugzilla.redhat.com | Issue Tracking, Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Red Hat would like to thank Andrej Tomci for reporting this issue. (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-05-28T03:15:51.639Z | Reported to Red Hat. |
| CNA | 2026-05-28T03:16:49.326Z | Made public. |
| ADP | 2026-05-28T03:15:51.639Z | Reported to Red Hat. |
| ADP | 2026-05-28T03:16:49.326Z | Made public. |
Solutions
ADP: RHSA-2026:30050: Red Hat build of Keycloak 26.4
ADP: RHSA-2026:30084: Red Hat build of Keycloak 26.6
ADP: RHSA-2026:30049: Red Hat build of Keycloak 26.4.13
ADP: RHSA-2026:30083: Red Hat build of Keycloak 26.6.4
Workarounds
CNA: To mitigate this issue, disable the Fine-Grained Admin Permissions (FGAPv2) feature in Keycloak if it is not strictly required. This can typically be done by setting `adminPermissionsEnabled` to `false` in the realm configuration. Disabling FGAPv2 will prevent the exploitation of this flaw by removing the vulnerable functionality. However, this may impact administrative delegation capabilities within Keycloak. A restart or reload of the Keycloak service may be required for the changes to take effect.
ADP: To mitigate this issue, disable the Fine-Grained Admin Permissions (FGAPv2) feature in Keycloak if it is not strictly required. This can typically be done by setting `adminPermissionsEnabled` to `false` in the realm configuration. Disabling FGAPv2 will prevent the exploitation of this flaw by removing the vulnerable functionality. However, this may impact administrative delegation capabilities within Keycloak. A restart or reload of the Keycloak service may be required for the changes to take effect.