CVE-2026-41870: Apache Nutch

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

Missing Authorization, Improper Control of Generation of Code ('Code Injection'), Improper Control of Dynamically-Managed Code Resources, 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 1.11 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 products

• Apache Nutch: from 1.11, before 1.23 (fixed in 1.23)

Published 2026-09-09. Last modified 2026-09-11.