CVE-2025-11419— Keycloak: keycloak tls client-initiated renegotiation denial of service
Quick assessment
Affected
CVE-2025-11419
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，该漏洞源于未限制TLS 1.2客户端重协商请求，可能导致拒绝服务。
Possible ATT&CK Techniques 2 AI
T1499.003 · Application Exhaustion Flood T1499.001 · OS Exhaustion FloodI. Basic Information for CVE-2025-11419
Vulnerability Information
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Vulnerability Title
Keycloak: keycloak tls client-initiated renegotiation denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Keycloak. This vulnerability allows an unauthenticated remote attacker to cause a denial of service (DoS) by repeatedly initiating TLS 1.2 client-initiated renegotiation requests to exhaust server CPU resources, making the service unavailable.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
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，该漏洞源于未限制TLS 1.2客户端重协商请求，可能导致拒绝服务。
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 |
|---|---|---|---|---|
| - | - | 0 ~ 26.0.16 | - |
|
| Red Hat | Red Hat build of Keycloak 26.0 | 26.0.16-2 ~ * |
cpe:/a:redhat:build_keycloak:26.0::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.0 | 26.0-20 ~ * |
cpe:/a:redhat:build_keycloak:26.0::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.0 | 26.0-21 ~ * |
cpe:/a:redhat:build_keycloak:26.0::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.0.16 | - |
cpe:/a:redhat:build_keycloak:26.0
|
|
| Red Hat | Red Hat build of Keycloak 26.2 | 26.2.10-2 ~ * |
cpe:/a:redhat:build_keycloak:26.2::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.2 | 26.2-11 ~ * |
cpe:/a:redhat:build_keycloak:26.2::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.2 | 26.2-11 ~ * |
cpe:/a:redhat:build_keycloak:26.2::el9
|
|
| Red Hat | Red Hat build of Keycloak 26.2.10 | - |
cpe:/a:redhat:build_keycloak:26.2::el9
|
|
II. Public POCs for CVE-2025-11419
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2025-11419 (5)
IV. Related Vulnerabilities
Same weakness: CWE-770
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V. Comments for CVE-2025-11419
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