CVE-2026-42796

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 v3 9.8 CRITICAL

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/Arelle/Arelle/pull/2320	Issue Tracking Patch
https://github.com/Arelle/Arelle/releases/tag/2.39.10	Release Notes
https://www.vulncheck.com/advisories/arelle-unauthenticated-rce-via-rest-configure	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:workiva:arelle:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-04 18:16

Updated : 2026-06-17 10:48

NVD link : CVE-2026-42796

Mitre link : CVE-2026-42796

CVE.ORG link : CVE-2026-42796

JSON object : View

Products Affected

workiva

arelle

CWE

CWE-306

Missing Authentication for Critical Function

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