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CVE-2026-3121— Keycloak: org.keycloak/keycloak-services: keycloak: privilege escalation via manage-clients permission

Quick assessment

Affected
Red Hat Red Hat build of Keycloak 26.4
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Keycloak是Keycloak开源的一种开源身份和访问管理解决方案。 Keycloak存在安全漏洞，该漏洞源于manage-clients权限配置不当，可能导致权限提升。

CVSS 6.5 · Medium EPSS 0.47% · P39

Possible ATT&CK Techniques 1 AI

T1078.004 · Cloud Accounts
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I. Basic Information for CVE-2026-3121

Vulnerability Information
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Vulnerability Title
Keycloak: org.keycloak/keycloak-services: keycloak: privilege escalation via manage-clients permission
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak. An administrator with `manage-clients` permission can exploit a misconfiguration where this permission is equivalent to `manage-permissions`. This allows the administrator to escalate privileges and gain control over roles, users, or other administrative functions within the realm. This privilege escalation can occur when admin permissions are enabled at the realm level.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权授予不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Keycloak 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak开源的一种开源身份和访问管理解决方案。 Keycloak存在安全漏洞，该漏洞源于manage-clients权限配置不当，可能导致权限提升。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat build of Keycloak 26.4 26.4.11-1 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4 26.4-14 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4 26.4-14 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4.11 - cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat JBoss Enterprise Application Platform 8 - cpe:/a:redhat:jboss_enterprise_application_platform:8
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack - cpe:/a:redhat:jbosseapxp
Red Hat Red Hat Single Sign-On 7 - cpe:/a:redhat:red_hat_single_sign_on:7

II. Public POCs for CVE-2026-3121

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III. Intelligence Information for CVE-2026-3121

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Vendor Advisories for CVE-2026-3121 (4)

Same Patch Batch · Red Hat · 2026-03-26 · 16 CVEs total

CVE-2025-12805 8.1 HIGH Llama-stack-k8s-operator: llama stack service exposed across namespaces due to missing net
CVE-2026-1961 8.0 HIGH Forman: foreman: remote code execution via command injection in websocket proxy
CVE-2026-2436 6.5 MEDIUM Libsoup: libsoup: denial of service via use-after-free in soupserver during tls handshake
CVE-2026-4887 6.1 MEDIUM Gimp: gimp:memory disclosure and denial of service via specially crafted pcx image
CVE-2026-4897 5.5 MEDIUM Polkit: polkit: denial of service via unbounded input processing through standard input
CVE-2026-2272 4.3 MEDIUM Gimp: gimp: memory corruption due to integer overflow in ico file handling
CVE-2026-3190 4.3 MEDIUM Keycloak: keycloak: information disclosure via improper role enforcement in uma 2.0 protec
CVE-2026-2271 3.3 LOW Gimp: gimp: denial of service via crafted psp image file
CVE-2026-0968 3.1 LOW Libssh: libssh: denial of service due to malformed sftp message
CVE-2026-4874 3.1 LOW Org.keycloak.protocol.oidc.grants: org.keycloak.services.managers: keycloak: server-side r
CVE-2026-2239 2.8 LOW Gimp: gimp: application crash (dos) via crafted psd file due to heap-buffer-overflow
CVE-2026-0965 Libssh: libssh: denial of service via improper configuration file handling
CVE-2026-0967 Libssh: libssh: denial of service via inefficient regular expression processing
CVE-2026-0964 Libssh: improper sanitation of paths received from scp servers
CVE-2026-0966 Libssh: libssh: denial of service via zero-length input in ssh_get_hexa()

IV. Related Vulnerabilities

Same product: Red Hat build of Keycloak 26.4
Same vendor: Red Hat
Same weakness: CWE-266

V. Comments for CVE-2026-3121

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