CVE-2026-47838: Spring Framework Spring Security Vulnerable To Unauthorized Vulnerability

MODERATE
Advisory Identifier: GHSA-293q-567p-wmwq
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CVSS 6.8
CWE-287
Published
Advisory Summary

CVE-2026-47838 is a MODERATE (CVSS 6.8) spring security vulnerable to unauthorized vulnerability (CWE-287: Improper Authentication) affecting Spring Framework libraries in the Maven ecosystem. The issue involves spring security vulnerable to unauthorized user impersonation when using x.509 client certificates. Remediation is available by upgrading affected packages to version 6.5.11.

CVE-2026-47838 at a Glance

CVE Identifier CVE-2026-47838
GHSA Identifier GHSA-293q-567p-wmwq
Severity MODERATE
CVSS v3.1 Base Score 6.8
CWE Classification CWE-287: Improper Authentication
Affected Product Spring Framework
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2026-47838

To remediate this vulnerability, upgrade all affected Spring Framework dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

org.springframework.security:spring-security-web fixed: 6.5.11 
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-web</artifactId>
    <version>6.5.11</version>
</dependency>
org.springframework.security:spring-security-web fixed: Latest secure release 
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-web</artifactId>
    <version>Latest secure release</version>
</dependency>
org.springframework.security:spring-security-web fixed: Latest secure release 
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-web</artifactId>
    <version>Latest secure release</version>
</dependency>
org.springframework.security:spring-security-web fixed: Latest secure release 
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-web</artifactId>
    <version>Latest secure release</version>
</dependency>
org.springframework.security:spring-security-web fixed: Latest secure release 
<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-web</artifactId>
    <version>Latest secure release</version>
</dependency>
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree -Dincludes=org.springframework.security

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-47838, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.springframework.security

Analyze the terminal output to locate any version of Spring Framework in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 6.5.11), your application is affected.

Note: The mvn dependency:tree -Dincludes=org.springframework.security command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-287: Improper Authentication, where when an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. In Spring Framework, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

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.

CVE-2026-47838 Affected Spring Framework Versions

5 component(s)
Fixed Versions:
6.5.11
Product / Package Ecosystem Affected Versions Fixed Version
org.springframework.security:spring-security-web
maven/org.springframework.security/spring-security-web
Maven
≥ 6.5.0
< 6.5.11
6.5.11
org.springframework.security:spring-security-web
maven/org.springframework.security/spring-security-web
Maven
≥ 6.4.0
≤ 6.4.13
org.springframework.security:spring-security-web
maven/org.springframework.security/spring-security-web
Maven
≥ 6.0.0
≤ 6.3.10
org.springframework.security:spring-security-web
maven/org.springframework.security/spring-security-web
Maven
≥ 5.8.0
≤ 5.8.16
org.springframework.security:spring-security-web
maven/org.springframework.security/spring-security-web
Maven
≤ 5.7.14

References

NVD — CVE-2026-47838 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47838
GitHub Advisory / Wiki ADVISORY
https://github.com/advisories/GHSA-2jrg-rf5x-568g
Spring Framework Security Information SECURITY
https://spring.io/security/cve-2026-47838
Spring Framework Security Information SECURITY
spring-projects/spring-security

Frequently Asked Questions

What is CVE-2026-47838?
CVE-2026-47838 is a security vulnerability in Spring Framework involving Spring Security Vulnerable to Unauthorized User Impersonation when Using X.509 Client Certificates under CWE-287: Improper Authentication.
Which Spring Framework versions are affected?
Affected versions include releases prior to 6.5.11 across affected packages: org.springframework.security:spring-security-web.
What version fixes CVE-2026-47838?
Upgrading to 6.5.11 (or the latest patched release for your respective branch) resolves the vulnerability.
Is spring-security-web affected?
Yes, org.springframework.security:spring-security-web is affected in releases prior to 6.5.11, Latest secure release. Upgrade your dependency to 6.5.11, Latest secure release or later.
What is the CVSS score of CVE-2026-47838?
CVE-2026-47838 has a CVSS v3.1 base score of 6.8 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N.
What CWE is associated with CVE-2026-47838?
CVE-2026-47838 is classified under CWE-287: Improper Authentication (When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.).
How can I check Maven dependencies for CVE-2026-47838?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.springframework.security'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-293q-567p-wmwq",
  "modified" : "2026-06-30T21:35:09Z",
  "published" : "2026-06-10T00:31:53Z",
  "aliases" : [ "CVE-2026-47838" ],
  "summary" : "Spring Security Vulnerable to Unauthorized User Impersonation when Using X.509 Client Certificates",
  "details" : "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.\n\n`SubjectDnX509PrincipalExtractor` is deprecated by this CVE and replaced with `SubjectX500PrincipalExtractor`. As part of updating, you should also migrate to `SubjectX500PrincipalExtractor`.\n\nAffected versions:\nSpring 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. \nOSS 6.5.0 through 6.5.10.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework.security:spring-security-web"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.5.0"
      }, {
        "fixed" : "6.5.11"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 6.5.10"
    }
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework.security:spring-security-web"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.4.0"
      }, {
        "last_affected" : "6.4.13"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework.security:spring-security-web"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "6.0.0"
      }, {
        "last_affected" : "6.3.10"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework.security:spring-security-web"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "5.8.0"
      }, {
        "last_affected" : "5.8.16"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.springframework.security:spring-security-web"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "5.7.14"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-47838"
  }, {
    "type" : "ADVISORY",
    "url" : "https://github.com/advisories/GHSA-2jrg-rf5x-568g"
  }, {
    "type" : "WEB",
    "url" : "https://spring.io/security/cve-2026-47838"
  }, {
    "type" : "PACKAGE",
    "url" : "spring-projects/spring-security"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-287" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-06-30T21:35:09Z",
    "nvd_published_at" : "2026-06-10T00:16:54Z"
  }
}