CVE-2026-82386
Received Received - Intake

XML External Entity Processing in Apache Roller

Publication date: 2026-09-28

Last updated on: 2026-09-28

Assigner: Apache Software Foundation

Description
Improper Restriction of XML External Entity Reference in Apache Roller 6.1.5 allows a weblog administrator to read files readable by the Roller process and reach internal network addresses by importing a crafted OPML document, because the bookmark import parser does not disable external entity resolution. No non-default configuration is required; the import is reached through the administrator bookmark-import action. Users are recommended to upgrade to Apache Roller 6.1.6 or later, which uses a hardened parser that disables external entities and document type declarations.

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Meta Information

Published
2026-09-28
Last Modified
2026-09-28
Generated
2026-09-28
AI Q&A
2026-09-28
EPSS Evaluated
N/A
NVD
CVE-2026-82386
EUVD
EUVD-2026-88130

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
apache roller 6.1.5
apache roller 6.1.6

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-611 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.

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Executive Summary

CVE-2026-82386 is an XML External Entity (XXE) vulnerability in Apache Roller 6.1.5. It allows a weblog administrator to read files accessible to the Roller process and access internal network addresses by importing a specially crafted OPML document. The issue occurs because the bookmark import parser does not disable external entity resolution.

Detection Guidance

To detect this vulnerability, check if your Apache Roller instance is running version 6.1.5 or earlier. Look for OPML import functionality used by weblog administrators. Inspect XML parsing logs for external entity resolution attempts or DOCTYPE declarations in imported files.

Impact Analysis

An attacker with weblog administrator access could exploit this to read sensitive files on the server or access internal systems. This could lead to data breaches, unauthorized information disclosure, or further network compromise depending on the server's configuration and permissions.

Compliance Impact

This vulnerability could lead to unauthorized access to sensitive data, which may violate GDPR's data protection principles or HIPAA's security requirements for protected health information. Organizations using affected versions may face compliance violations, legal penalties, or reputational damage if exploited.

Mitigation Strategies

Upgrade Apache Roller to version 6.1.6 or later immediately. This version includes a hardened parser that disables external entities and document type declarations. No additional configuration is required after the upgrade.

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