CVE-2026-42796

CRITICAL SEVERITY

CVSS Score & Metrics

Base Score

9.8 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H                                    

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.

Vulnerability Details

Published Date

May 04, 2026

Last Modified

May 05, 2026

CWE ID

CWE-306

Source

NVD

Vendor

Arelle

Product

Arelle

External 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-configure

CVE-2026-42796

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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