CVE-2026-47838
Published:June 09, 2026
Updated:June 11, 2026
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
https://github.com/spring-projects/spring-security.git (GITHUB):
Affected version(s) >=1.0.0 <6.5.11Fix Suggestion:
Update to version 6.5.11https://github.com/spring-projects/spring-security.git (GITHUB):
Affected version(s) >=7.0.0 <7.0.6Fix Suggestion:
Update to version 7.0.6org.springframework.security:spring-security-config (JAVA):
Affected version(s) >=5.8.0 <5.8.27Fix Suggestion:
Update to version 5.8.27org.springframework.security:spring-security-config (JAVA):
Affected version(s) >=6.3.0 <6.3.18Fix Suggestion:
Update to version 6.3.18org.springframework.security:spring-security-config (JAVA):
Affected version(s) >=5.7.0 <5.7.25Fix Suggestion:
Update to version 5.7.25org.springframework.security:spring-security-config (JAVA):
Affected version(s) >=6.4.0 <6.4.18Fix Suggestion:
Update to version 6.4.18org.springframework.security:spring-security-web (JAVA):
Affected version(s) >=6.3.0 <6.3.18Fix Suggestion:
Update to version 6.3.18org.springframework.security:spring-security-web (JAVA):
Affected version(s) >=5.8.0 <5.8.27Fix Suggestion:
Update to version 5.8.27org.springframework.security:spring-security-web (JAVA):
Affected version(s) >=6.5.0 <6.5.11Fix Suggestion:
Update to version 6.5.11org.springframework.security:spring-security-web (JAVA):
Affected version(s) >=5.7.0 <5.7.25Fix Suggestion:
Update to version 5.7.25org.springframework.security:spring-security-web (JAVA):
Affected version(s) >=6.4.0 <6.4.18Fix Suggestion:
Update to version 6.4.18org.springframework.security:spring-security-config (JAVA):
Affected version(s) >=6.5.0 <6.5.11Fix Suggestion:
Update to version 6.5.11Related Resources (1)
Do you need more information?
Contact UsCVSS v4
Base Score:
7.6
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
6.8
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
Improper Authentication
EPSS
Base Score:
0.02