Arbitrary Code Injection Affecting org.apache.nutch:nutch package, versions [1.11,1.23)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published8 Nov 2026
- disclosed9 Sept 2026
- creditTh1nk
Introduced: 9 Sep 2026
CVE-2026-41870 (opens in a new tab)How to fix?
Upgrade org.apache.nutch:nutch to version 1.23 or higher.
Overview
Affected versions of this package are vulnerable to Arbitrary Code Injection via the create method in the Nutch REST API’s JobResource. The endpoint accepts job-creation requests without authorization, and JobManagerImpl loads a request-supplied job class reflectively before running it; an attacker who can reach an exposed Nutch Server can submit a malicious job request and execute code with the server’s privileges.
Notes
- For Docker deployments, reaching the vulnerable job-creation path requires building with
BUILD_MODE=1or2; the defaultBUILD_MODE=0does not include the Nutch REST Server.
Workarounds
- Restrict access to instances running the Nutch Service to trusted users only, preventing untrusted users from reaching the vulnerable REST API.