CRITICALCVE-2026-42796Published Modified CNA VulnCheck
CVE-2026-42796: Arelle < 2.39.10 Unauthenticated RCE via /rest/configure
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.
Metrics
- CVSS v4.0
- 9.2
- Severity
- CRITICAL
- Fixed in
- 2.39.10
- Affected Products
- 1
Affected packages
- Arelle / Arelle< 2.39.10 (from 0)
CVSS 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:NReferences