CVE-2026-42796
Critical · 9.8CVSS
9.8
EPSS
3.9%
Published
May 4, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|
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