Apache Lucene.Net.Replicator Deserialization of Untrusted Data vulnerability

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

8.6 · CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2024-43383: 1.19% estimated exploitation activity in the next 30 days; percentile 68.00 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Deserialization of Untrusted Data vulnerability in Apache Lucene.Net.Replicator. This issue affects Apache Lucene.NET's Replicator library: from 4.8.0-beta00005 through 4.8.0-beta00016. An attacker that can intercept traffic between a replication client and server, or control the target replication node URL, can provide a specially-crafted JSON response that is deserialized as an attacker-provided exception type. This can result in remote code execution or other potential unauthorized access. Users are recommended to upgrade to version 4.8.0-beta00017, which fixes the issue.

Published by the source

31 Oct 2024, 12:30 UTC

Last modified by the source

11 Feb 2025, 19:01 UTC

Source last checked

26 Oct 2026, 17:03 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-2qw8-ppr5-m96c

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# Patch Next advisory brief: CVE-2024-43383

Advisory: Apache Lucene.Net.Replicator Deserialization of Untrusted Data vulnerability
IDs: CVE-2024-43383, GHSA-2qw8-ppr5-m96c
Record: https://patchnext.com/advisories/cve-2024-43383 (revision 1, source checked 26 Oct 2026, 17:03 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.6)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: lucene.net.replicator 4.8.0-beta00017. A vendor fix does not mean a deployment is fixed.

## Affected components
- NuGet lucene.net.replicator: affected >= 4.8.0-beta00005, < 4.8.0-beta00017; fixed in 4.8.0-beta00017

## Suggested inspection (read-only)
- NuGet lucene.net.replicator: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on lucene.net.replicator.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-2qw8-ppr5-m96c (GitHub-reviewed advisory GHSA-2qw8-ppr5-m96c lists affected ranges: NuGet lucene.net.replicator >=4.8.0-beta00005 <4.8.0-beta00017)

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