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CVE-2026-9705— Keycloak: keycloak: attacker can re-enable and take over disabled clients via registration access token

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存在会话机制问题漏洞，该漏洞源于客户端注册服务问题，可能导致持有先前已颁发注册访问令牌(RAT)的远程攻击者重新启用管理员已禁用的客户端，绕过安全控制，重置客户端密钥并获得特权API访问权限。

CVSS 6.5 · Medium EPSS 0.46% · P38

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-2026-9705

Vulnerability Information
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Vulnerability Title
Keycloak: keycloak: attacker can re-enable and take over disabled clients via registration access token
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak's client registration service. A remote attacker, possessing a previously issued Registration Access Token (RAT), could exploit this vulnerability to re-enable a client that an administrator had explicitly disabled. This bypasses security controls, allowing the attacker to reset the client's secret and potentially regain privileged API access. The primary impact includes unauthorized information disclosure and potential integrity compromise.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不充分的会话过期机制
Source: CVE Program / CVE List V5
Vulnerability Title
Keycloak 会话机制问题漏洞
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存在会话机制问题漏洞，该漏洞源于客户端注册服务问题，可能导致持有先前已颁发注册访问令牌(RAT)的远程攻击者重新启用管理员已禁用的客户端，绕过安全控制，重置客户端密钥并获得特权API访问权限。
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-2026-9705

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III. Intelligence Information for CVE-2026-9705

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Vendor Advisories for CVE-2026-9705 (1)

Other References for CVE-2026-9705 (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-2026-12993 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-2026-9799 4.6 MEDIUM Keycloak: keycloak: unauthorized access to resources via uma permission ticket bypass
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-613

V. Comments for CVE-2026-9705

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