CVE-2026-47838
Unauthorized User Impersonation when Using X.509 Client Certificates
MEDIUM 6.8
At a glance
- Source
- NVD
- EPSS
- EPSS 0.13 % · percentile 3 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- vmware
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-287 — Improper Authentication
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N | vmware |
| CVSS 3.1 | MEDIUM 6.8 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N | NVD · security@vmware.com (Secondary) |
| CVSS 3.1 | HIGH 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N | NVD · nvd@nist.gov (Primary) |
Advisories
- GHSA-293q-567p-wmwq — Spring Security Vulnerable to Unauthorized User Impersonation when Using X.509 Client Certificates
European references
- ENISA EUVD · EUVD-2026-35911
- GCVE · GCVE-0-2026-47838
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1206 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1165 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0934 — Multiples vulnérabilités dans les produits Atlassian · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*< 5.7.25cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*≥ 5.8.0 < 5.8.27cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*≥ 6.3.0 < 6.3.18cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*≥ 6.4.0 < 6.4.18cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*≥ 6.5.0 < 6.5.11
Affected products
| Product | Versions |
|---|---|
| Spring · Spring Security | affected 5.7.0 < 5.7.25 ; affected 5.8.0 < 5.8.27 ; affected 6.3.0 < 6.3.18 ; affected 6.4.0 < 6.4.18 ; affected 6.5.0 < 6.5.10.2 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |