CVE-2026-47898: Apache Lucene.Net: XXE vulnerability in Lucene.Net.Analysis.Common PatternParser

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-07-03 · updated 2026-10-25
Weakness: CWE-611

Description

Improper Restriction of XML External Entity Reference vulnerability in Apache Lucene.Net (Lucene.Net.Analysis.Common library). This issue affects Apache Lucene.Net.Analysis.Common: from 4.8.0-beta00005 before 4.8.0-beta00018. Users are recommended to upgrade to version 4.8.0-beta00018, which fixes the issue.

Affected products

Apache Software Foundation Apache Lucene.Net: 4.8.0-beta00005, 4.8.0-beta00006, 4.8.0-beta00007, 4.8.0-beta00008, 4.8.0-beta00009, 4.8.0-beta00010 (+7)

References

https://lists.apache.org/thread/7yn9k6sbbsk18yco5y2hszpcf8dst489
http://www.openwall.com/lists/oss-security/2026/07/03/3

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