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CVE-2026-94217— Keycloak-services: keycloak-services: uma scope merge across resource owners via resource name collision

Quick assessment

Affected

Red Hat Red Hat build of Keycloak 26.6.8

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 的用户管理型访问（UMA，User-Managed Access）实现中发现了一个缺陷。该问题出现在授权令牌端点处理权限票据（permission tickets）的过程中。当两个不同用户拥有同名资源时，如果其中一个用户请求授权令牌，系统会错误地合并这两个资源的权限。这使得攻击者能够获取到本不应被共享的受害者资源上的访问范围（scopes）。

CVSS 3.5 · Low EPSS 0.24% · P15 Updated Nov 06, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 4

Vendor	Product	Version Range	Status
Red Hat	Red Hat Build of Keycloak	`any`	affected
		`any`	affected
		`any`	affected
Red Hat	Red Hat Single Sign-On 7	`any`	unaffected

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Vulnerability Information

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Vulnerability Title

Keycloak-services: keycloak-services: uma scope merge across resource owners via resource name collision

Source: CVE Program / CVE List V5

Vulnerability Description

A flaw was found in the User-Managed Access (UMA) implementation of Keycloak. The issue occurs in the authorization token endpoint when processing permission tickets. If two different users own resources with the same name, the system incorrectly merges the permissions from both resources when one user requests an authorization token. This allows an attacker to gain access scopes on a victim's resource that were never intended to be shared.

Source: CVE Program / CVE List V5

CVSS Information

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

Source: CVE Program / CVE List V5

Vulnerability Type

授权机制缺失

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE
Red Hat	Red Hat build of Keycloak 26.6.8	-	`cpe:/a:redhat:build_keycloak:26.6::el9`
Red Hat	Red Hat build of Keycloak 26.6.8	-	`cpe:/a:redhat:build_keycloak:26.6::el9`
Red Hat	Red Hat build of Keycloak 26.6.8	-	`cpe:/a:redhat:build_keycloak:26.6::el9`
Red Hat	Red Hat Single Sign-On 7	-	`cpe:/a:redhat:red_hat_single_sign_on:7`

II. Public POCs for CVE-2026-94217

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-94217

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Vendor Advisories for CVE-2026-94217 (2)

🔗 CVE-2026-94217 - Red Hat Customer Portal vdb-entry x_refsource_REDHAT
🔗 2537313 – (CVE-2026-94217) CVE-2026-94217 keycloak-services: keycloak-services: UMA scope merge across resource owners via resource name collision issue-tracking x_refsource_REDHAT

Other References for CVE-2026-94217 (1)

https://access.redhat.com/errata/RHSA-2026:95761 vendor-advisory x_refsource_REDHAT

https://www.cve.org/CVERecord?id=CVE-2026-94217

Same Patch Batch · Red Hat · 2026-09-21 · 12 CVEs total

CVE-2026-80110	8.1 HIGH	Pki-core: dogtag pki v2 rest acl filter's reverse-lexicographic tie-break lets a ca agent
CVE-2026-15801	8.0 HIGH	Cri-o: cri-o: insufficient validation during container checkpoint restore
CVE-2026-94449	7.5 HIGH	Quarkus-smallrye-fault-tolerance: quarkus-smallrye-fault-tolerance: memory leak in @applyg
CVE-2026-75939	7.4 HIGH	Openshift/oc-mirror: release signature verification: openpgp signatureerror checked before
CVE-2026-94368	7.1 HIGH	Noobaa-core: noobaa-core: presigned put url escalation to copyobject via unsigned x-amz-co
CVE-2026-94215	5.5 MEDIUM	Keycloak-services: keycloak-services: cross-realm client read/write via request-level cach
CVE-2026-93433	5.5 MEDIUM	Libstoragemgmt: libstoragemgmt: denial of service via stack buffer overflow in scsi vpd pa
CVE-2026-94184	5.3 MEDIUM	Fetchmail: fetchmail: stack-based buffer overflow in ntlm authentication (fetchmail-sa-202
CVE-2026-94213	4.9 MEDIUM	Keycloak-services: keycloak-services: authorization services policy evaluation endpoint le
CVE-2026-92382	4.1 MEDIUM	Usbredir: usbredir: unbounded iso_packet_desc[] index in usbredirhost_iso_packet() leads t
CVE-2026-94218	3.1 LOW	Keycloak-services: keycloak-services: 2fa setup enforcement bypass via authentication sess

IV. Related Vulnerabilities

Same product: Red Hat build of Keycloak 26.6.8

Same vendor: Red Hat

Same weakness: CWE-862