CVE-2026-118947— Keycloak-services: keycloak-services: authorization bypass via uma resource registration idor

Quick assessment

Affected

Red Hat Red Hat Build of Keycloak

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.

在 Keycloak 的组件中，UMA（用户受控访问代理）资源注册端点存在一个缺陷。该组件提供了 Keycloak 授权和身份服务的核心逻辑。当启用远程资源管理功能时，拥有特定权限的已认证用户可通过在请求中提供目标资源 ID，更新其并不拥有的资源。此漏洞可能导致资源配置被未经授权地修改，包括资源名称、URI 和权限范围（scopes）等。

CVSS 4.3 · Medium Updated Oct 30, 2026

Possible ATT&CK Techniques 1 AI

T1548.001 · Setuid and Setgid

Get alerts for future matching vulnerabilities Log in to subscribe

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

Keycloak-services: keycloak-services: authorization bypass via uma resource registration idor

Source: CVE Program / CVE List V5

Vulnerability Description

A flaw was found in the UMA resource registration endpoint of the keycloak-services component, which provides the core logic for Keycloak's authorization and identity services. The issue occurs when remote resource management is enabled, allowing an authenticated user with specific permissions to update resources they do not own by providing a target resource ID in a request. This can lead to unauthorized modification of resource configurations, such as names, URIs, and scopes.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

通过用户控制密钥绕过授权机制

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE
Red Hat	Red Hat Build of Keycloak	-	`cpe:/a:redhat:build_keycloak:`
Red Hat	Red Hat Build of Keycloak	-	`cpe:/a:redhat:build_keycloak:`
Red Hat	Red Hat Single Sign-On 7	-	`cpe:/a:redhat:red_hat_single_sign_on:7`

II. Public POCs for CVE-2026-118947

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-118947

请登录查看更多情报信息。

Other References for CVE-2026-118947 (2)

https://access.redhat.com/security/cve/CVE-2026-118947 vdb-entry x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2563274 issue-tracking x_refsource_REDHAT

https://www.cve.org/CVERecord?id=CVE-2026-118947

Same Patch Batch · Red Hat · 2026-10-30 · 7 CVEs total

CVE-2026-103963	7.5 HIGH	Glib-networking: unbounded tls 1.3 session ticket queue growth in glib-networking allows r
CVE-2026-91920	6.5 MEDIUM	Undertow: undertow: chunkreader message length permits chunk-size overflow
CVE-2026-110133	5.8 MEDIUM	Ghostscript: heap buffer overflow in ghostscript truetype outliner due to npointstotal int
CVE-2026-118959	5.4 MEDIUM	Keycloak-services: keycloak-services: required actions bypassed via kc_action parameter
CVE-2026-118475	3.6 LOW	Eog: eye of gnome: buffer overrun when parsing malicious png files with non-standard iccp
CVE-2026-112922	3.3 LOW	Ghostscript: out-of-bounds read in ghostscript shade_next_color via integer overflow of in

IV. Related Vulnerabilities

Same product: Red Hat Build of Keycloak

Same vendor: Red Hat

Same weakness: CWE-639