Vulnerability Description
Arelle before 2.39.10 contains an unauthenticated remote code execution vulnerability in the /rest/configure REST endpoint that accepts a plugins query parameter and forwards it to the plugin manager without authentication or authorization. Attackers can supply a URL to a malicious Python file through the plugins parameter, causing the Arelle webserver to download and execute the attacker-controlled code within the Arelle process with its privileges.
CVSS Score
CRITICAL
Related Weaknesses (CWE)
References
- https://github.com/Arelle/Arelle/pull/2320
- https://github.com/Arelle/Arelle/releases/tag/2.39.10
- https://www.vulncheck.com/advisories/arelle-unauthenticated-rce-via-rest-configu
FAQ
What is CVE-2026-42796?
CVE-2026-42796 is a vulnerability with a CVSS score of 9.8 (CRITICAL). Arelle before 2.39.10 contains an unauthenticated remote code execution vulnerability in the /rest/configure REST endpoint that accepts a plugins query parameter and forwards it to the plugin manager ...
How severe is CVE-2026-42796?
CVE-2026-42796 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-42796?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.