CVE-2026-22747— Unauthorized User Impersonation when Using X.509 Client Certificates
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I. Basic Information for CVE-2026-22747
Vulnerability Information
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Vulnerability Title
Unauthorized User Impersonation when Using X.509 Client Certificates
Source: NVD (National Vulnerability Database)
Vulnerability Description
Vulnerability in Spring Spring Security. SubjectX500PrincipalExtractor does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the username. In a carefully crafted certificate, this can lead to an attacker impersonating another user. This issue affects Spring Security: from 7.0.0 through 7.0.4.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Spring Security 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Spring Security是Spring开源的一款具有认证和授权功能的安全框架。 Spring Security 7.0.4及之前版本存在安全漏洞，该漏洞源于SubjectX500PrincipalExtractor未正确处理某些畸形X.509证书CN值，可能导致读取错误的用户名，在精心构造的证书中可能导致攻击者冒充其他用户。
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 |
|---|---|---|---|---|
| Spring | Spring Security | 7.0.0 ~ 7.0.4 | - |
II. Public POCs for CVE-2026-22747
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|---|
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Same Patch Batch · Spring · 2026-04-22 · 5 CVEs total
| CVE-2026-22754 | 7.5 HIGH | ervlet Path Not Correctly Included in Path Matching of XML Authorization Rules |
| CVE-2026-22753 | 7.5 HIGH | Servlet Path Not Correctly Included in Path Matching of HttpSecurity#securityMatchers |
| CVE-2026-22748 | 5.3 MEDIUM | Potential Security Misconfiguration when Using withIssuerLocation |
| CVE-2026-22746 | 3.7 LOW | User Attribute Enumeration when Using DaoAuthenticationProvider |
IV. Related Vulnerabilities
Same product: Spring Security
- CVE-2026-22754
ervlet Path Not Correctly Included in Path Matching of XML A - CVE-2026-22753
Servlet Path Not Correctly Included in Path Matching of Http - CVE-2026-22748
Potential Security Misconfiguration when Using withIssuerLoc - CVE-2026-22746
User Attribute Enumeration when Using DaoAuthenticationProvi - CVE-2026-22751
Spring Security JdbcOneTimeTokenService allows a one-time to
V. Comments for CVE-2026-22747
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