CVE-2026-47838
Medium
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.
SeverityMedium
CVSS6.8
Exploit probability—
Product
Vmware Spring Security
PublishedJun 10, 2026
First seenJun 10, 2026
Weakness typeCWE-287Improper authentication
How to fix
Update
- vmware spring_security5.7.25, 5.8.27, 6.3.18, 6.4.18, 6.5.11 or later
- org.springframework.security:spring-security-web6.5.11 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vmware spring_security | v < 5.7.25, 5.8.0 ≤ v < 5.8.27, 6.3.0 ≤ v < 6.3.18, 6.4.0 ≤ v < 6.4.18, 6.5.0 ≤ v < 6.5.11 | 5.7.25, 5.8.27, 6.3.18, 6.4.18, 6.5.11 |
| org.springframework.security:spring-security-webMaven | 6.5.0 ≤ v < 6.5.11, 6.4.0 ≤ v ≤ 6.4.13, 6.0.0 ≤ v ≤ 6.3.10, 5.8.0 ≤ v ≤ 5.8.16, v ≤ 5.7.14 | 6.5.11 |
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