CVE-2026-42796

Arelle < 2.39.10 Unauthenticated RCE via /rest/configure

Published May 4, 2026 CVSS 4.0 · 9.2 Critical EPSS 2.7% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Workiva
Workiva arelle
CPEs cpe:2.3:a:workiva:arelle:*:*:*:*:*:*:*:*
Vendors & Products Workiva
Workiva arelle
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Arelle
Arelle arelle
Vendors & Products Arelle
Arelle arelle
Type Values Removed Values Added
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.
Title Arelle < 2.39.10 Unauthenticated RCE via /rest/configure
Weaknesses CWE-306
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 8, 2026, 2:03 PM
Reserved
Apr 29, 2026, 8:58 PM
Status
Analyzed
Published
May 4, 2026, 6:16 PM
Modified
Nov 11, 2026, 11:10 PM