Local data disclosure via unvalidated external DTD
Published Jul 3, 2026 · Updated Jul 3, 2026
XXE in PatternParser in Apache Lucene.NET 4.8.0-beta00005 through 4.8.0-beta00017 allows local users to read data via crafted XML. PatternParser's DtdResolver accepts an unexpected external DTD filename and falls back to default resolution instead of rejecting it. Exploitation requires a high-privilege local caller able to supply PatternParser input; the reported consequence is data disclosure without writes or service interruption.
Summary
What happened
XXE in PatternParser in Apache Lucene.NET 4.8.0-beta00005 through 4.8.0-beta00017 allows local users to read data via crafted XML. PatternParser's DtdResolver accepts an unexpected external DTD filename and falls back to default resolution instead of rejecting it. Exploitation requires a high-privilege local caller able to supply PatternParser input; the reported consequence is data disclosure without writes or service interruption.
The record
- CVE
- CVE-2026-47898
- Published
- Jul 3, 2026
- Updated
- Jul 3, 2026
- Vendor
- The Apache Software Foundation
- Product
- Apache Lucene.NET
- Classifications
- CWE-611, T1005
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Jul 3, 2026CVE publishedPublication date reported by the CVE source.
- Jul 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=4.8.0-beta00005 <4.8.0-beta00018
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Public exploit references
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Technologies
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Your stack
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