CVE-2026-41870: Missing Authorization, Improper Control of Generation of Code ('Code Injection'), Improper Control of Dynamica

This month

HIGH 8.8WATCHLISTUPGRADE

CVE-2026-41870 is a high-severity flaw (CVSS 8.8) affecting nutch. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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 possibl

Why this priority

High severity
On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.7% (top 48%)
CISA exploited list	No
Weakness	CWE-94, CWE-470, CWE-862, CWE-913
Published	2026-09-09
Last modified	2026-09-11

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-09-11 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-09 11:17 UTCPublished CVE record published
2026-09-11 13:06 UTCUpdated Record last modified

apache nutch UPGRADE

Affected: >= 1.11 and < 1.23

Fixed in: 1.23

Safe to downgrade to: a release before 1.11

1. Check installed version

apt-cache policy nutch || rpm -q nutch || nutch --version

2. UPGRADE to 1.23 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade nutch

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade nutch

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 1.11 (Debian / Ubuntu)

apt-cache madison nutch sudo apt install nutch=<VERSION_BEFORE_1.11> sudo apt-mark hold nutch

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list nutch sudo dnf downgrade nutch-<VERSION_BEFORE_1.11> sudo dnf versionlock add nutch

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-41870?

nutch: upgrade to 1.23. Exact commands for each OS are on this page.

Is CVE-2026-41870 being exploited?

CVE-2026-41870 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-41870 affect?

CVE-2026-41870 affects nutch. Severity is high (CVSS 8.8). 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 Ap

How urgent is CVE-2026-41870?

Priority 49/100. High severity; On your watchlist

Related CVEs

CVE-2026-41869 CRITICAL 9.1 UPGRADE Missing Authorization, Improper Resource Shutdown and Job Interruption vulnerability in Apache Nutch Server (
CVE-2026-41871 CRITICAL 9.8 UPGRADE Missing Authorization, Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vuln

References

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