CVE-2026-47897 Apache Software Foundation CVE debrief

Who should care

Users of Apache Lucene.Net.Replicator library versions between 4.8.0-beta00005 and 4.8.0-beta00017 should be concerned about this vulnerability. This includes developers, administrators, and security teams responsible for maintaining and securing systems that utilize the affected library. The vulnerability's high CVSS score and potential impact on data security necessitate prompt attention and mitigation.

Technical summary

The CVE-2026-47897 vulnerability is classified as a Path Traversal issue within the Apache Lucene.Net.Replicator library. This vulnerability has been assigned a CVSS score of 8.9, indicating a high severity level. The affected versions range from 4.8.0-beta00005 up to but not including 4.8.0-beta00018. The vulnerability allows attackers to potentially access files and directories outside of the intended restricted directory due to improper limitation of a pathname. Users are strongly recommended to upgrade to version 4.8.0-beta00018, which fixes the issue.

Defensive priority

High priority should be given to upgrading Apache Lucene.Net.Replicator to version 4.8.0-beta00018 due to the high CVSS score and potential impact of the Path Traversal vulnerability. Immediate action is necessary to prevent potential exploitation and minimize the risk of unauthorized access to sensitive data.

Recommended defensive actions

• Upgrade Apache Lucene.Net.Replicator to version 4.8.0-beta00018
• Review and update inventory of affected versions
• Monitor for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-07-03T08:16:24.817Z and was last modified on 2026-07-08T18:29:03.233Z. The NVD entry is currently Analyzed. This information is based on the NVD entry and the CVE record. The vulnerability affects Apache Lucene.Net.Replicator library versions from 4.8.0-beta00005 up to but not including 4.8.0-beta00018. Users are advised to upgrade to version 4.8.0-beta00018 to address this issue. Evidence limits suggest that further details may be available through vendor advisories or third-party sources.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.