CVE-2026-78356: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-8jjm-2gpw-mmqf
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CVSS 5.3
CWE-497
Published
Advisory Summary

CVE-2026-78356 is a MODERATE (CVSS 5.3) security vulnerability vulnerability (CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-78356 at a Glance

CVE Identifier CVE-2026-78356
GHSA Identifier GHSA-8jjm-2gpw-mmqf
Severity MODERATE
CVSS v3.1 Base Score 5.3
CWE Classification CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.3

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:L/I:N/A:N).

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 Low (C:L)
Integrity None (I:N)
Availability None (A:N)

How to Fix CVE-2026-78356

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-2026-78356, 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-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere, where the product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does. 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

The OTRS Agent Frontend configuration endpoint can be accessed without authentication. This allows unauthenticated remote users to retrieve internal application configuration that is intended for use by the authenticated Agent Frontend. The exposed information may include configured frontend routes and their associated authorization groups, authentication configuration, enabled product features, third-party integration settings, and other implementation details. The exposed configuration does not directly contain user credentials or provide unauthorized modification of the OTRS configuration. However, the disclosed information may assist an attacker in fingerprinting the affected OTRS installation and identifying enabled functionality or security-relevant configuration that could be used to prepare further attacks. This issue affects OTRS: * 8.0.X * 2023.X * 2024.X * 2025.X * 2026.X before 2026.7.X

References

NVD — CVE-2026-78356 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78356
Software Release RELEASE
https://otrs.com/release-notes/otrs-security-advisory-2026-13

Frequently Asked Questions

What is CVE-2026-78356?
CVE-2026-78356 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-78356?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-78356?
CVE-2026-78356 has a CVSS v3.1 base score of 5.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
What CWE is associated with CVE-2026-78356?
CVE-2026-78356 is classified under CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere (The product does not properly prevent sensitive system-level information from being accessed by unauthorized actors who do not have the same level of access to the underlying system as the product does.).
How can I check Maven dependencies for CVE-2026-78356?
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-8jjm-2gpw-mmqf",
  "modified" : "2026-10-12T09:31:21Z",
  "published" : "2026-10-12T09:31:21Z",
  "aliases" : [ "CVE-2026-78356" ],
  "details" : "The OTRS Agent Frontend configuration endpoint can be accessed without authentication. This allows unauthenticated remote users to retrieve internal application configuration that is intended for use by the authenticated Agent Frontend. The exposed information may include configured frontend routes and their associated authorization groups, authentication configuration, enabled product features, third-party integration settings, and other implementation details.\n\nThe exposed configuration does not directly contain user credentials or provide unauthorized modification of the OTRS configuration. However, the disclosed information may assist an attacker in fingerprinting the affected OTRS installation and identifying enabled functionality or security-relevant configuration that could be used to prepare further attacks.\n\nThis issue affects OTRS:\n\n  *  8.0.X\n  *  2023.X\n  *  2024.X\n  *  2025.X\n  *  2026.X before 2026.7.X",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-78356"
  }, {
    "type" : "WEB",
    "url" : "https://otrs.com/release-notes/otrs-security-advisory-2026-13"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-497" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-12T07:16:36Z"
  }
}