Vulnerability · Published Jul 3, 2026 · Assigned by apache
CVE-2026-47898Apache Lucene.Net: XXE vulnerability in Lucene.Net.Analysis.Common PatternParser
Medium 4.0
In plain English
A medium-severity XML external entity in Apache Lucene.Net from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 4.0)4.0Medium
Exploit odds (30 days)0.5%top 59.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache Lucene.Net | 4.8.0-beta00005 – before 4.8.0-beta00018 |
Weakness: CWE-611 · Vector: 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