SB2026072608 - Improper Authentication in Spring Security
Published: July 26, 2026
Security Bulletin ID
SB2026072608
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Authentication (CVE-ID: CVE-2026-47838)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote user to impersonate another user.
The vulnerability exists due to improper authentication in SubjectDnX509PrincipalExtractor when processing malformed X.509 certificate CN values. A remote user can present a carefully crafted certificate to impersonate another user.
The issue can cause the extractor to read the wrong value for the username.
Remediation
Install update from vendor's website.