---
id: CVE-2026-41871
title: >-
  Apache Nutch: Unauthenticated reflection-based job execution in Nutch Server
  (Nutch REST API)
summary: "Missing Authorization, Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability\_in Apache Nutch Server  (Nutch REST API).\n\n\n\nThis issue affects Apache Nutch: from 1.10 through 1.22.\n\n\n\nUsers are re…"
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cvssSource: adp
cwe:
  - CWE-862
  - CWE-470
vendor: Apache Software Foundation
product: Apache Nutch
affected:
  - apache_nutch >= 1.10 <= 1.22
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-09-10T17:56:31.666015Z'
published: '2026-09-09'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T17:56:50.962Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-41871'
references:
  - url: 'https://lists.apache.org/thread/rbr63fx8vlrhzrfknq2l0mg0d0blsl54'
tags:
  - cve.org
epss: 0.00777
epssPercentile: 0.54386
ingestedAt: '2026-09-11T14:42:19.864Z'
---

## Overview

Missing Authorization, Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Nutch Server  (Nutch REST API).



This issue affects Apache Nutch: from 1.10 through 1.22.



Users are recommended to upgrade to version 1.23, which removes the Nutch Server.
If an upgrade is not possible, user must restrict access to instances running the Nutch Service to trusted users only.
Please, also visit the  Apache Nutch security advisories https://nutch.apache.org/documentation/security/ .

## Affected

- `apache_nutch >= 1.10 <= 1.22`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.