CVE-2026-82376: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-hfqv-pmcp-9hpg
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CVSS 7.7
CWE-611
Published
Advisory Summary

CVE-2026-82376 is a HIGH (CVSS 7.7) security vulnerability vulnerability (CWE-611: Improper Restriction of XML External Entity Reference) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product processes an xml document that can contain xml entities with uris that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-82376 at a Glance

CVE Identifier CVE-2026-82376
GHSA Identifier GHSA-hfqv-pmcp-9hpg
Severity HIGH
CVSS v3.1 Base Score 7.7
CWE Classification CWE-611: Improper Restriction of XML External Entity Reference
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.7

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

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

How to Fix CVE-2026-82376

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-2026-82376, 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-611: Improper Restriction of XML External Entity Reference, where the product processes an xml document that can contain xml entities with uris that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output. 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

Improper Restriction of XML External Entity Reference in Apache Roller 6.1.5 allows a user with entry-editing rights on a weblog to cause the server to parse an attacker-influenced trackback response with an XML parser that does not disable external entity resolution, leading to disclosure of files readable by the Roller process. The Trackback control is hidden in the standard UI, but its action remains directly reachable, and no non-default server configuration is required. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which removes the outbound trackback response parser.

References

NVD — CVE-2026-82376 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82376
Software Source Repository REPOSITORY
https://github.com/apache/roller/pull/163
lists.apache.org/thread/dxqmd3873q87... WEB
https://lists.apache.org/thread/dxqmd3873q87h06xpjjc9lnvp4jblz0l
Software Security Information SECURITY
http://www.openwall.com/lists/oss-security/2026/09/25/9

Frequently Asked Questions

What is CVE-2026-82376?
CVE-2026-82376 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-611: Improper Restriction of XML External Entity Reference.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-82376?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-82376?
CVE-2026-82376 has a CVSS v3.1 base score of 7.7 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
What CWE is associated with CVE-2026-82376?
CVE-2026-82376 is classified under CWE-611: Improper Restriction of XML External Entity Reference (The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.).
How can I check Maven dependencies for CVE-2026-82376?
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-hfqv-pmcp-9hpg",
  "modified" : "2026-09-28T09:30:26Z",
  "published" : "2026-09-28T09:30:26Z",
  "aliases" : [ "CVE-2026-82376" ],
  "details" : "Improper Restriction of XML External Entity Reference in Apache Roller 6.1.5 allows a user with entry-editing rights on a weblog to cause the server to parse an attacker-influenced trackback response with an XML parser that does not disable external entity resolution, leading to disclosure of files readable by the Roller process. The Trackback control is hidden in the standard UI, but its action remains directly reachable, and no non-default server configuration is required. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which removes the outbound trackback response parser.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-82376"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/apache/roller/pull/163"
  }, {
    "type" : "WEB",
    "url" : "https://lists.apache.org/thread/dxqmd3873q87h06xpjjc9lnvp4jblz0l"
  }, {
    "type" : "WEB",
    "url" : "http://www.openwall.com/lists/oss-security/2026/09/25/9"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-611" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-28T08:16:41Z"
  }
}