Medium 4.0Published Jul 3, 2026

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

Updated under an hour ago (Oct 26, 2026, 11:00 PM ET)

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It affects Apache Software Foundation Apache Lucene.Net and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache Lucene.Net

Exploited in the last 30 days

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.

CVSS: 4.0 MEDIUM (v4.0, CNA)CVSS:4.0/AV:L/AC:H/AT:N/PR:H/UI:N/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N
Weakness (CWE): CWE-611
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Analyzed
Record last updated: Jul 6, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache Lucene.Net apache_software_foundation:apache_lucene.net (from the name)	from 4.8.0-beta00005 before 4.8.0-beta00018	CNA record
apache lucene.net apache:lucene.net	4.8.0; 4.8.0; 4.8.0; 4.8.0; 4.8.0; 4.8.0; 4.8.0; 4.8.0; and 5 more ranges	NVD

References

References

https://lists.apache.org/thread/7yn9k6sbbsk18yco5y2hszpcf8dst489	vendor-advisory, mailing-list
http://www.openwall.com/lists/oss-security/2026/07/03/3	mailing-list, third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.