CVE-2026-2331: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-cvvv-49vh-384q
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CVSS 9.8
CWE-552
Published
Advisory Summary

CVE-2026-2331 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (CWE-552: Files or Directories Accessible to External Parties) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product makes files or directories accessible to unauthorized actors, even though they should not be.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-2331 at a Glance

CVE Identifier CVE-2026-2331
GHSA Identifier GHSA-cvvv-49vh-384q
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-552: Files or Directories Accessible to External Parties
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

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

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

How to Fix CVE-2026-2331

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

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

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-2331, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

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

Note: The mvn dependency:tree 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-552: Files or Directories Accessible to External Parties, where the product makes files or directories accessible to unauthorized actors, even though they should not be. In Software, 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

An attacker may perform unauthenticated read and write operations on sensitive filesystem areas via the AppEngine Fileaccess over HTTP due to improper access restrictions. A critical filesystem directory was unintentionally exposed through the HTTP-based file access feature, allowing access without authentication. This includes device parameter files, enabling an attacker to read and modify application settings, including customer-defined passwords. Additionally, exposure of the custom application directory may allow execution of arbitrary Lua code within the sandboxed AppEngine environment.

References

NVD — CVE-2026-2331 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-2331
www.cisa.gov/resources-tools/res... WEB
https://www.cisa.gov/resources-tools/resources/ics-recommended-practices
www.first.org/cvss/calculator/3.1 WEB
https://www.first.org/cvss/calculator/3.1
www.sick.com/.well-known/csaf/wh... WEB
https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0006.json
www.sick.com/.well-known/csaf/wh... WEB
https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0006.pdf
Software Security Information SECURITY
https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf
www.sick.com/psirt WEB
https://www.sick.com/psirt

Frequently Asked Questions

What is CVE-2026-2331?
CVE-2026-2331 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-552: Files or Directories Accessible to External Parties.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-2331?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-2331?
CVE-2026-2331 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-2331?
CVE-2026-2331 is classified under CWE-552: Files or Directories Accessible to External Parties (The product makes files or directories accessible to unauthorized actors, even though they should not be.).
How can I check Maven dependencies for CVE-2026-2331?
Run the dependency tree command: 'mvn dependency:tree'. 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-cvvv-49vh-384q",
  "modified" : "2026-03-06T09:31:33Z",
  "published" : "2026-03-06T09:31:33Z",
  "aliases" : [ "CVE-2026-2331" ],
  "details" : "An attacker may perform unauthenticated read and write operations on sensitive filesystem areas via the AppEngine Fileaccess over HTTP due to improper access restrictions. A critical filesystem directory was unintentionally exposed through the HTTP-based file access feature, allowing access without authentication. This includes device parameter files, enabling an attacker to read and modify application settings, including customer-defined passwords. Additionally, exposure of the custom application directory may allow execution of arbitrary Lua code within the sandboxed AppEngine environment.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-2331"
  }, {
    "type" : "WEB",
    "url" : "https://www.cisa.gov/resources-tools/resources/ics-recommended-practices"
  }, {
    "type" : "WEB",
    "url" : "https://www.first.org/cvss/calculator/3.1"
  }, {
    "type" : "WEB",
    "url" : "https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0006.json"
  }, {
    "type" : "WEB",
    "url" : "https://www.sick.com/.well-known/csaf/white/2026/sca-2026-0006.pdf"
  }, {
    "type" : "WEB",
    "url" : "https://www.sick.com/media/docs/9/19/719/special_information_sick_operating_guidelines_cybersecurity_by_sick_en_im0106719.pdf"
  }, {
    "type" : "WEB",
    "url" : "https://www.sick.com/psirt"
  } ],
  "database_specific" : {
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    "severity" : "CRITICAL",
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    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-03-06T08:16:27Z"
  }
}