{"id":"CVE-2026-42796","title":"Arelle < 2.39.10 Unauthenticated RCE via /rest/configure","summary":"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 authorizati…","severity":"critical","cvss":9.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-306"],"vendor":"Arelle","product":"Arelle","affected":["Arelle < 2.39.10"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-05-04T20:21:28.928481Z"},"exploitAvailable":true,"published":"2026-05-04","updated":"2026-11-08","sourceUpdated":"2026-11-08T14:03:19.409Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-42796","references":[{"url":"https://github.com/Arelle/Arelle/releases/tag/2.39.10","label":"Arelle 2.39.10 Release Notes"},{"url":"https://github.com/Arelle/Arelle/pull/2320"},{"url":"https://www.vulncheck.com/advisories/arelle-unauthenticated-rce-via-rest-configure"}],"tags":["cve.org","exploit-available"],"epss":0.02747,"epssPercentile":0.8629,"exploits":{"github":1,"githubRepos":["https://github.com/ameerhamza-malik/CVE-2026-42796"],"nuclei":["CVE-2026-42796"],"checkedAt":"2026-11-08T14:51:57.345Z"},"ingestedAt":"2026-11-08T14:51:22.432Z","slug":"CVE-2026-42796","body":"## Overview\n\nArelle 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.\n\n## Affected\n\n- `Arelle < 2.39.10`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":66,"depthScoreParts":{"impact":53.9,"likelihood":0.5,"exploitation":12,"ransomware":0},"changes":[]}