Apache Lucene.Net up to 4.8.0-beta00017 path traversal

Summaryinfo

A vulnerability, which was classified as critical, has been found in Apache Lucene.Net up to 4.8.0-beta00017. This issue affects some unknown processing. Performing a manipulation results in path traversal. This vulnerability was named CVE-2026-47897. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical has been found in Apache Lucene.Net up to 4.8.0-beta00017. This affects an unknown functionality. The manipulation with an unknown input leads to a path traversal vulnerability. CWE is classifying the issue as CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. This is going to have an impact on confidentiality. The summary by CVE is:

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 before 4.8.0-beta00018. Users are recommended to upgrade to version 4.8.0-beta00018, which fixes the issue.

It is possible to read the advisory at lists.apache.org. This vulnerability is uniquely identified as CVE-2026-47897 since 05/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/03/2026). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 4.8.0-beta00018 eliminates this vulnerability.

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Productinfo

Vendor

• Apache

Name

• Lucene.Net

Version

• 4.8.0-beta00017

License

• open-source

Website

• Vendor: https://www.apache.org/

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