Answer in brief
CVE-2026-47838 records a Medium severity (CVSS 6.8) vulnerability in Spring Security Vulnerable to Unauthorized User Impersonation when Using X.509 Client Certificates. The current sources do not mark it as known exploited. The current feed maps org.springframework.security:spring-security-web (maven), org.springframework.security:spring-security-web (maven), org.springframework.security:spring-security-web (maven), org.springframework.security:spring-security-web (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps org.springframework.security:spring-security-web (maven), org.springframework.security:spring-security-web (maven), org.springframework.security:spring-security-web (maven), org.springframework.security:spring-security-web (maven) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| org.springframework.security:spring-security-webmaven | >=6.5.0,<=6.5.10 | 6.5.11 |
| org.springframework.security:spring-security-webmaven | >=6.4.0,<=6.4.13 | Not reported |
| org.springframework.security:spring-security-webmaven | >=6.0.0,<=6.3.10 | Not reported |
| org.springframework.security:spring-security-webmaven | >=5.8.0,<=5.8.16 | Not reported |
| org.springframework.security:spring-security-webmaven | <=5.7.14 | Not reported |
| org.springframework.security:spring-security-webmaven | >=6.5.0 <6.5.11 | 6.5.11 |
| org.springframework.security:spring-security-webmaven | >=6.4.0 | Not reported |
| org.springframework.security:spring-security-webmaven | >=6.0.0 | Not reported |
| org.springframework.security:spring-security-webmaven | >=5.8.0 | Not reported |
| org.springframework.security:spring-security-webmaven | >=0 | Not reported |
Published upstream
Jun 10, 2026
Evidence: source:osv:source_dates:source-dates:recordSource modified
Sep 10, 2026
Evidence: source:osv:source_dates:source-dates:recordFirst seen by HOL
Jun 30, 2026
In Spring Security Web, `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. `SubjectDnX509PrincipalExtractor` is deprecated by this CVE and replaced with `SubjectX500PrincipalExtractor`. As part of updating, you should also migrate to `SubjectX500PrincipalExtractor`. Affected versions: Spring Security Enterprise 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. OSS 6.5.0 through 6.5.10.
Quoted source text, attributed separately from HOL analysis.