Unauthorized User Impersonation when Using X.509 Client Certificates
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Spring | Spring Security | unaffected |
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Configuration 1 [-]
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| Spring | Spring Security |
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| Source | ID | Title |
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Github GHSA |
GHSA-293q-567p-wmwq | Spring Security Vulnerable to Unauthorized User Impersonation when Using X.509 Client Certificates |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.133% probability within 30 days)
| Link | Providers |
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| https://spring.io/security/cve-2026-47838 |
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| Type | Values Removed | Values Added |
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| Metrics |
ssvc
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| Type | Values Removed | Values Added |
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| First Time appeared |
Spring
Spring spring Security |
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| Vendors & Products |
Spring
Spring spring Security |
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| Description | SubjectDnX509PrincipalExtractor 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. Affected versions: Spring Security 5.7.0 through 5.7.24; 5.8.0 through 5.8.26; 6.3.0 through 6.3.17; 6.4.0 through 6.4.17; 6.5.0 through 6.5.10. | |
| Title | Unauthorized User Impersonation when Using X.509 Client Certificates | |
| Weaknesses | CWE-287 | |
| References |
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| Metrics |
cvssV3_1
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