{"id":"CVE-2026-42796","aliases":["EUVD-2026-27079","GHSA-m48p-vcj6-wq3j"],"status":"published","title":"Arelle \u003c 2.39.10 Unauthenticated RCE via /rest/configure","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.","severity":{"version":"4.0","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","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.02747,"percentile":0.86383,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-306"],"published":"2026-05-04T17:19:43Z","modified":"2026-11-09T02:47:24Z","exploits":[{"source":"pocgithub","id":"ameerhamza-malik/CVE-2026-42796","title":"ameerhamza-malik/CVE-2026-42796","date":"2026-05-08","url":"https://github.com/ameerhamza-malik/CVE-2026-42796"},{"source":"nuclei","id":"CVE-2026-42796","title":"Arelle \u003c 2.39.10 - Remote Code Execution","type":"detection template","url":"https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2026/CVE-2026-42796.yaml"}],"products":[{"vendor":"arelle","product":"arelle"},{"vendor":"workiva","product":"arelle"}],"references":[{"url":"https://github.com/Arelle/Arelle/releases/tag/2.39.10","tags":["release-notes","patch","Release Notes","fix"]},{"url":"https://github.com/Arelle/Arelle/pull/2320","tags":["issue-tracking","patch","Issue Tracking","Patch","fix"]},{"url":"https://www.vulncheck.com/advisories/arelle-unauthenticated-rce-via-rest-configure","tags":["third-party-advisory","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42796","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-m48p-vcj6-wq3j"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42796.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-42796","title":"Arelle \u003c 2.39.10 Unauthenticated RCE via /rest/configure","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.","status":"published","published":"2026-05-04T17:19:43.02Z","modified":"2026-11-08T14:03:19.409Z","cvss":[{"version":"4.0","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","level":"critical","assessor":"cna"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-306"],"updated_at":"2026-11-08T15:43:33.322657Z"}],"euvd":[{"id":"EUVD-2026-27079","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.","status":"published","published":"2026-05-04T17:19:43Z","modified":"2026-11-08T14:03:19Z","cvss":[{"version":"4.0","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","level":"critical"}],"updated_at":"2026-11-08T15:13:08.77824Z"}],"ghsa":[{"id":"GHSA-m48p-vcj6-wq3j","title":"Arelle before 2.39.10 contains an unauthenticated remote code execution vulnerability in the ...","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.","status":"published","published":"2026-05-04T18:30:32Z","modified":"2026-05-04T18:30:43Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T15:07:54.172768Z"}],"nvd":[{"id":"CVE-2026-42796","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.","status":"published","published":"2026-05-04T18:16:32.52Z","modified":"2026-06-17T10:48:25.633Z","cvss":[{"version":"4.0","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:12:17.022502Z"}],"osv":[{"id":"CVE-2026-42796","title":"Arelle \u003c 2.39.10 Unauthenticated RCE via /rest/configure","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.","status":"published","published":"2026-05-04T17:19:43.02Z","modified":"2026-11-09T02:47:24.719802479Z","cvss":[{"version":"4.0","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","level":"critical"}],"cwes":["CWE-306"],"updated_at":"2026-11-09T03:16:17.543303Z"}]}}