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CVE-2026-9799— Keycloak: keycloak: unauthorized access to resources via uma permission ticket bypass

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组织开源的一种开源身份和访问管理解决方案。 Keycloak存在授权问题漏洞，该漏洞源于用户管理访问授权中的访问控制问题，可能导致通过特定权限请求前缀绕过按资源访问控制，从而未经授权访问同一资源服务器内的所有资源。

CVSS 4.6 · Medium EPSS 0.29% · P20

Affected Version Matrix 8

VendorProduct Version RangeStatus
Red Hat Red Hat build of Keycloak 26.4 26.4.13-1< * unaffected
26.4-19< * unaffected
26.4-19< * unaffected
Red Hat Red Hat build of Keycloak 26.4.13 any unaffected
Red Hat Red Hat build of Keycloak 26.6 26.6.4-2< * unaffected
26.6-8< * unaffected
26.6-8< * unaffected
Red Hat Red Hat build of Keycloak 26.6.4 any unaffected
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I. Basic Information for CVE-2026-9799

Vulnerability Information
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Vulnerability Title
Keycloak: keycloak: unauthorized access to resources via uma permission ticket bypass
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in org.keycloak.authorization. An authenticated user with a granted User-Managed Access (UMA) permission ticket for one resource can exploit this by using a specific permission request prefix to bypass per-resource access control. This allows the user to gain unauthorized access to all resources of that type within the same resource server, even if they do not have a ticket for those specific resources. This vulnerability requires the resource server to be configured in PERMISSIVE policy enforcement mode and affects typed resources with ownerManagedAccess enabled, where no explicit policy protects the resource type. The primary consequence is unauthorized information disclosure or modification of resources.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/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
Vulnerability Title
Keycloak 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Keycloak是Keycloak组织开源的一种开源身份和访问管理解决方案。 Keycloak存在授权问题漏洞，该漏洞源于用户管理访问授权中的访问控制问题，可能导致通过特定权限请求前缀绕过按资源访问控制，从而未经授权访问同一资源服务器内的所有资源。
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 26.4.13-1 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4 26.4-19 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4 26.4-19 ~ * cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.4.13 - cpe:/a:redhat:build_keycloak:26.4::el9
Red Hat Red Hat build of Keycloak 26.6 26.6.4-2 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6 26.6-8 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6 26.6-8 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6.4 - cpe:/a:redhat:build_keycloak:26.6::el9

II. Public POCs for CVE-2026-9799

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III. Intelligence Information for CVE-2026-9799

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Vendor Advisories for CVE-2026-9799 (1)

Other References for CVE-2026-9799 (5)

Same Patch Batch · Red Hat · 2026-06-25 · 13 CVEs total

CVE-2026-12975 8.5 HIGH Apicurio/apicurio-registry: apicurio-registry: unhardened saxparser in content-type detect
CVE-2026-9800 8.1 HIGH Keycloak-policy-enforcer: keycloak policy enforcer: authorization bypass via incorrect uri
CVE-2026-11800 8.1 HIGH Org.keycloak:keycloak-services: keycloak: authentication bypass via jwt algorithm confusio
CVE-2026-9099 7.7 HIGH Keycloak: group-admin escalation to realm-admin
CVE-2026-12992 7.4 HIGH Apicurio/apicurio-registry: apicurio-registry: ssrf via wsdl4j import dereference in wsdl
CVE-2026-9086 7.3 HIGH Keycloak: keycloak: cross-site scripting (xss) via case-insensitive uri validation bypass
CVE-2026-13083 6.9 MEDIUM Pen-drive: pen-drive: stored xss via unescaped cluster data in html report
CVE-2026-9705 6.5 MEDIUM Keycloak: keycloak: attacker can re-enable and take over disabled clients via registration
CVE-2026-12993 6.5 MEDIUM Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via
CVE-2026-13318 6.4 MEDIUM Virt-api-rhel9: kubevirt: kubevirt: ssrf in virt-api port-forward via unvalidated guest-ag
CVE-2026-9083 4.9 MEDIUM Keycloak: keycloak: information disclosure through arbitrary filesystem path probing
CVE-2026-13218 4.2 MEDIUM Kubevirt: kubevirt: symlink following in writetocachedfile allows host file overwrite from

IV. Related Vulnerabilities

Same product: Red Hat build of Keycloak 26.4
Same vendor: Red Hat
Same weakness: CWE-639

V. Comments for CVE-2026-9799

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