medium6.8
CVE-2026-47838
SubjectDnX509PrincipalExtractor does not correctly handle certain malformed X.509 certificate CN values, which can lead to reading the wrong value for the user…
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | org.springframework.security:spring-security-web | >= 6.5.0, <= 6.5.10 | 6.5.11 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Vmware | Spring Security | before 5.7.25 from 5.8.0 before 5.8.27 from 6.3.0 before 6.3.18 from 6.4.0 before 6.4.18 from 6.5.0 before 6.5.11 |