Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-9796— Keycloak: keycloak: privilege escalation via time-of-check to time-of-use (toctou) vulnerability

Quick assessment

Affected
Red Hat Red Hat build of Keycloak 26.6
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，该漏洞源于具有manage-clients角色的经过身份验证的管理员可利用基于名称的管理员角色检查中的检查时间到使用时间漏洞，可能导致攻击者将其权限提升为领域内所有用户的realm-admin角色，从而获得对系统的广泛控制，且复合角色关系在攻击者权限被撤销和系统重启后仍然存在。

CVSS 6.5 · Medium EPSS 0.22% · P12

Affected Version Matrix 4

VendorProduct Version RangeStatus
Red Hat Red Hat build of Keycloak 26.6 26.6.6-1< * unaffected
26.6-12< * unaffected
26.6-12< * unaffected
Red Hat Red Hat build of Keycloak 26.6.6 any unaffected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-9796

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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: keycloak: privilege escalation via time-of-check to time-of-use (toctou) vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak. An authenticated administrator with the `manage-clients` role can exploit a Time-of-check to time-of-use (TOCTOU) vulnerability in the name-based admin role checks. This allows the attacker to escalate their privileges to `realm-admin` for all users within the realm, granting them extensive control over the system. The composite role relationship persists even after the attacker's own permissions are revoked and across system reboots.
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
检查时间与使用时间(TOCTOU)的竞争条件
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，该漏洞源于具有manage-clients角色的经过身份验证的管理员可利用基于名称的管理员角色检查中的检查时间到使用时间漏洞，可能导致攻击者将其权限提升为领域内所有用户的realm-admin角色，从而获得对系统的广泛控制，且复合角色关系在攻击者权限被撤销和系统重启后仍然存在。
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 26.6 26.6.6-1 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6 26.6-12 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6 26.6-12 ~ * cpe:/a:redhat:build_keycloak:26.6::el9
Red Hat Red Hat build of Keycloak 26.6.6 - cpe:/a:redhat:build_keycloak:26.6

II. Public POCs for CVE-2026-9796

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-9796

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-9796 (3)

Other References for CVE-2026-9796 (1)

Same Patch Batch · Red Hat · 2026-05-28 · 14 CVEs total

CVE-2026-4408 9.0 CRITICAL Samba: remote code execution in samr
CVE-2026-9804 7.7 HIGH Kubevirt: kubevirt: vmexport directory symlink escape enables exporter pod file read
CVE-2026-9795 7.3 HIGH Keycloak: keycloak: privilege escalation via improper scope mapping enforcement
CVE-2026-44604 7.0 HIGH Rpm: command injection in rpmuncompress dountar() via unescaped archive top-level director
CVE-2026-9802 6.8 MEDIUM Keycloak: keycloak: unauthorized account access via replayed refresh tokens after cluster
CVE-2026-9792 6.5 MEDIUM Keycloak: keycloak: security restriction bypass allows unauthorized ropc token acquisition
CVE-2026-9793 5.9 MEDIUM Keycloak: keycloak: security policy bypass in jwe-encrypted request object processing
CVE-2026-9794 5.3 MEDIUM Keycloak: keycloak: information disclosure via saml ecp endpoint
CVE-2026-9803 5.3 MEDIUM Keycloak: keycloak: denial of service via malformed authorization header
CVE-2026-9801 4.9 MEDIUM Keycloak: keycloak: denial of service via malformed ldap password policy response
CVE-2026-9791 4.3 MEDIUM Keycloak-rhel9: organization data leak after feature disabled in keycloak
CVE-2026-9798 4.3 MEDIUM Keycloak: keycloak: brute-force protection bypass in ciba flow
CVE-2026-10028 4.3 MEDIUM Glib-networking: infinite loop in glib-networking gnutls backend allows remote denial of s

IV. Related Vulnerabilities

Same product: Red Hat build of Keycloak 26.6
Same vendor: Red Hat
Same weakness: CWE-367

V. Comments for CVE-2026-9796

No comments yet

Leave a comment