CVE-2026-41871
CriticalCVSS 9.8Exploitation Probability (EPSS)
Elevated risk54th percentile - higher than 54% of all known CVEs
Summary
Missing Authorization and Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Nutch Server (Nutch REST API). This affects versions from 1.10 through 1.22.
Risk Assessment
Unauthorized users can exploit missing authorization to perform dangerous operations, potentially leading to system compromise.
Recommendation
Upgrade to version 1.23, which removes the Nutch Server. If upgrade is not possible, restrict access to trusted users only.
Other vulnerabilities in Apache Nutch
See all- CVE-2026-41869Critical
Missing Authorization and Improper Resource Shutdown and Job Interruption vulnerability in Apache Nutch Server (Nutch REST API). This affects versions from 1.10 through 1.22.
- CVE-2026-41870High
Missing Authorization, Improper Control of Generation of Code ('Code Injection'), Improper Control of Dynamically-Managed Code Resources, and Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Nutch Server (Nutch REST API). This affects versions from 1.11 through 1.22.
Original NVD description (English source)
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/ .
Vulnerability data from NVD (NIST) · CISA KEV · EPSS