CVE-2026-6501: JOpenDocument JOpenDocument Has An Improper Restriction Vulnerability

MODERATE
Advisory Identifier: GHSA-j9rh-p96m-mhhp
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CWE-611
Published
Advisory Summary

CVE-2026-6501 is a MODERATE jopendocument has an improper restriction vulnerability (CWE-611: Improper Restriction of XML External Entity Reference) affecting JOpenDocument libraries in the Maven ecosystem. The issue involves jopendocument has an improper restriction of xml external entity reference vulnerability. Remediation is available in the latest vendor maintenance releases.

CVE-2026-6501 at a Glance

CVE Identifier CVE-2026-6501
GHSA Identifier GHSA-j9rh-p96m-mhhp
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-611: Improper Restriction of XML External Entity Reference
Affected Product JOpenDocument
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-6501

To remediate this vulnerability, upgrade all affected JOpenDocument 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.jopendocument:jOpenDocument fixed: Latest secure release 
<dependency>
    <groupId>org.jopendocument</groupId>
    <artifactId>jOpenDocument</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.jopendocument

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-6501, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree -Dincludes=org.jopendocument

Analyze the terminal output to locate any version of JOpenDocument 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 -Dincludes=org.jopendocument 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 JOpenDocument, 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 vulnerability in ILM Informatique jOpenDocument allows Data Serialization External Entities Blowup. This issue affects jOpenDocument: 1.5.

CVE-2026-6501 Affected JOpenDocument Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
org.jopendocument:jOpenDocument
maven/org.jopendocument/jOpenDocument
Maven
≤ 1.3

References

NVD — CVE-2026-6501 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6501
JOpenDocument Security Information SECURITY
https://www.jopendocument.org/documentation.html

Frequently Asked Questions

What is CVE-2026-6501?
CVE-2026-6501 is a security vulnerability in JOpenDocument involving jOpenDocument has an improper restriction of XML external entity reference vulnerability under CWE-611: Improper Restriction of XML External Entity Reference.
Which JOpenDocument versions are affected?
Affected versions include releases prior to current release patches across affected packages: org.jopendocument:jOpenDocument.
What version fixes CVE-2026-6501?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is jOpenDocument affected?
Yes, org.jopendocument:jOpenDocument is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with CVE-2026-6501?
CVE-2026-6501 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-2026-6501?
Run the dependency tree command: 'mvn dependency:tree -Dincludes=org.jopendocument'. 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-j9rh-p96m-mhhp",
  "modified" : "2026-05-08T17:29:26Z",
  "published" : "2026-05-04T15:31:15Z",
  "aliases" : [ "CVE-2026-6501" ],
  "summary" : "jOpenDocument has an improper restriction of XML external entity reference vulnerability",
  "details" : "Improper restriction of XML external entity reference vulnerability in ILM Informatique jOpenDocument allows Data Serialization External Entities Blowup.\n\nThis issue affects jOpenDocument: 1.5.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Maven",
      "name" : "org.jopendocument:jOpenDocument"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "1.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-6501"
  }, {
    "type" : "WEB",
    "url" : "https://www.jopendocument.org/documentation.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-611" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-08T17:29:26Z",
    "nvd_published_at" : "2026-05-04T15:16:05Z"
  }
}