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CVE-2026-47838

33
FAUCET Score

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.

First published: Jun 9, 2026Last modified: Jun 30, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 5.7.25CPE matchmatch criteria
cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*
>= 5.8.0, < 5.8.27CPE matchmatch criteria
cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*
>= 6.3.0, < 6.3.18CPE matchmatch criteria
cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*
>= 6.4.0, < 6.4.18CPE matchmatch criteria
cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*
>= 6.5.0, < 6.5.11CPE matchmatch criteria
cpe:2.3:a:vmware:spring_security:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.8MEDIUM

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
1.6
Impact Score
5.2
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.12%
Probability of exploitation in next 30 days
EPSS Percentile
1.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0012 is in the 0th percentile among its peer group of 17,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

mavenpatch availablevia ghsa
Product: org.springframework.security:spring-security-webFixed in: 6.5.11

Vendor Advisories (1)

mavenGHSA-293q-567p-wmwqmedium

Spring Security Vulnerable to Unauthorized User Impersonation when Using X.509 Client Certificates

Jun 10, 2026

References

spring.io / security/cve-2026-47838
Vendor Advisory