🛡️ CVE-2026-42796
🔴 CVSS 9.8 — Critical ✅ No Known Exploit CWE-306 NVD
9.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity CRITICAL
CVSS Score 9.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE CWE-306
Public Exploit ✅ No
Source NVD
Published 2026-05-04
Updated 2026-06-02
Modified 2026-05-27

Affected Packages

Software From version Fixed in
arelle 2.39.10
unknown

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