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CVE-2026-47896— Apache Lucene.Net: Unauthenticated arbitrary file read on the Lucene.Net.Replicator replication server

Quick assessment

Affected
Apache Software Foundation Apache Lucene.Net
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache lucene.net是美国Apache基金会开源的一个全文检索库。 Apache lucene.net 4.8.0-beta00005版本至4.8.0-beta00017版本存在路径遍历漏洞，该漏洞源于Lucene.Net.Replicator库中存在路径遍历漏洞，可能导致攻击者访问受限目录外的文件。

AI Predicted 7.5 Difficulty: Moderate EPSS 0.81% · P55

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
Apache Software Foundation Apache Lucene.Net 4.8.0-beta00005< 4.8.0-beta00018 affected
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I. Basic Information for CVE-2026-47896

Vulnerability Information
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Vulnerability Title
Apache Lucene.Net: Unauthenticated arbitrary file read on the Lucene.Net.Replicator replication server
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability in Apache Lucene.Net (Lucene.Net.Replicator library). This issue affects Apache Lucene.Net.Replicator: from 4.8.0-beta00005 through 4.8.0-beta00017. Users are recommended to upgrade to version 4.8.0-beta00018, which fixes the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/AU:Y/RE:L
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Apache lucene.net 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache lucene.net是美国Apache基金会开源的一个全文检索库。 Apache lucene.net 4.8.0-beta00005版本至4.8.0-beta00017版本存在路径遍历漏洞，该漏洞源于Lucene.Net.Replicator库中存在路径遍历漏洞，可能导致攻击者访问受限目录外的文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache Lucene.Net 4.8.0-beta00005 ~ 4.8.0-beta00018 -

II. Public POCs for CVE-2026-47896

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III. Intelligence Information for CVE-2026-47896

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Mailing List Discussions for CVE-2026-47896 (1)

Same Patch Batch · Apache Software Foundation · 2026-07-03 · 3 CVEs total

CVE-2026-47897 Apache Lucene.Net: Arbitrary file write from malicious server to Lucene.Net.Replicator cli
CVE-2026-47898 Apache Lucene.Net: XXE vulnerability in Lucene.Net.Analysis.Common PatternParser

IV. Related Vulnerabilities

Same product: Apache Lucene.Net
Same vendor: Apache Software Foundation
Same weakness: CWE-22

V. Comments for CVE-2026-47896

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