CVE•Published 2026-05-04•Modified 2026-05-27•1 article on news•6 live references•NVD data
CVE-2026-42796Workiva · Arelle
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
51
Exploit Prediction Scoring System · top 49% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2026-05-04
Modified 2026-05-27
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-42796Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Workiva Arelle"All exposed Workiva Arelle instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Arelle"HTTP body or banner mentions "Arelle" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-42796Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-42796Censys host search filtered to this CVE id.
grep.app
CVE-2026-42796Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-42796GitHub code search for direct mentions.
Google dork
"CVE-2026-42796" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.