Critical
Arelle < 2.39.10 Unauthenticated RCE via /rest/configure
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-42796
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 16:38 UTC · Revision 1
Source evidence
Arelle < 2.39.10 Unauthenticated RCE via /rest/configure
core-osv · Original sourcePublished 4 May 2026, 17:19 UTC
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.
osv:CVE-2026-42796
Complete source record
{
"id": "20440867f98992a41e75922a8f7d35b75433a5f575fe28110ac9505f597cddf0",
"url": "https://osv.dev/vulnerability/CVE-2026-42796",
"method": "structured",
"payload": {
"kind": "advisory",
"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 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.",
"evidence": "osv:CVE-2026-42796",
"products": [],
"severity": "critical",
"structured": {
"id": "CVE-2026-42796",
"aliases": [
"CVE-2026-42796"
],
"metrics": [
{
"type": "CVSS_V4",
"score": "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"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/arelle/arelle",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "0733db1f789202e3417d2b71dbd02d486da01299"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "2.39.10"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StandardRange"
},
{
"range": [
{
"fixed": "0733db1f789202e3417d2b71dbd02d486da01299"
}
],
"source": "REFERENCES_TAG",
"original_tag": "2.39.10"
},
{
"cpe": "cpe:2.3:a:workiva:arelle:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "2.39.10"
}
],
"source": "CPE_RANGE"
}
]
}
}
],
"versions": [
"2.39.7",
"2.39.9",
"2.39.8",
"2.39.6",
"2.39.5",
"2.39.4",
"2.39.3",
"2.39.2",
"2.39.1",
"2.39.0",
"2.38.21",
"2.38.20",
"2.38.19",
"2.38.18",
"2.38.17",
"2.38.16",
"2.38.15",
"2.38.14",
"2.38.13",
"2.38.12",
"2.38.11",
"2.38.10",
"2.38.9",
"2.38.8",
"2.38.7",
"2.38.6",
"2.38.5",
"2.38.4",
"2.38.3",
"2.38.2",
"2.38.1",
"2.38.0",
"2.37.78",
"2.37.77",
"2.37.76",
"2.37.75",
"2.37.74",
"2.37.73",
"2.37.72",
"2.37.71",
"2.37.70",
"2.37.69",
"2.37.68",
"2.37.67",
"2.37.66",
"2.37.65",
"2.37.64",
"2.37.63",
"2.37.62",
"2.37.61",
"2.37.60",
"2.37.59",
"2.37.58",
"2.37.57",
"2.37.56",
"2.37.55",
"2.37.54",
"2.37.53",
"2.37.52",
"2.37.51",
"2.37.50",
"2.37.49",
"2.37.48",
"2.37.47",
"2.37.46",
"2.37.45",
"2.37.44",
"2.37.43",
"2.37.42",
"2.37.41",
"2.37.40",
"2.37.39",
"2.37.38",
"2.37.36",
"2.37.37",
"2.37.35",
"2.37.34",
"2.37.33",
"2.37.32",
"2.37.31",
"2.37.30",
"2.37.29",
"2.37.28",
"2.37.27",
"2.37.26",
"2.37.25",
"2.37.24",
"2.37.23",
"2.37.22",
"2.37.21",
"2.37.20",
"2.37.19",
"2.37.18",
"2.37.17",
"2.37.16",
"2.37.15",
"2.37.14",
"2.37.13",
"2.37.11",
"2.37.12",
"2.37.10",
"2.37.9",
"2.37.8",
"2.37.7",
"2.37.6",
"2.37.5",
"2.37.4",
"2.37.3",
"2.37.2",
"2.37.1",
"2.37.0",
"2.36.40",
"2.36.39",
"2.36.38",
"2.36.37",
"2.36.36",
"2.36.35",
"2.36.34",
"2.36.33",
"2.36.32",
"2.36.31",
"2.36.30",
"2.36.29",
"2.36.28",
"2.36.27",
"2.36.26",
"2.36.25",
"2.36.24",
"2.36.23",
"2.36.22",
"2.36.21",
"2.36.20",
"2.36.19",
"2.36.18",
"2.36.17",
"2.36.16",
"2.36.15",
"2.36.14",
"2.36.13",
"2.36.12",
"2.36.11",
"2.36.10",
"2.36.9",
"2.36.8",
"2.36.7",
"2.36.6",
"2.36.5",
"2.36.4",
"2.36.3",
"2.36.2",
"2.36.1",
"2.36.0",
"2.35.18",
"2.35.17",
"2.35.16",
"2.35.15",
"2.35.14",
"2.35.13",
"2.35.12",
"2.35.8",
"2.35.11",
"2.35.10",
"2.35.9",
"2.35.7",
"2.35.6",
"2.35.5",
"2.35.4",
"2.35.3",
"2.35.2",
"2.35.1",
"2.35.0",
"2.34.0",
"2.33.1",
"2.33.0",
"2.32.2",
"2.32.1",
"2.32.0",
"2.31.6",
"2.31.5",
"2.31.4",
"2.31.3",
"2.31.2",
"2.31.1",
"2.31.0",
"2.30.33",
"2.30.32",
"2.30.31",
"2.30.30",
"2.30.29",
"2.30.28",
"2.30.27",
"2.30.19",
"2.30.26",
"2.30.25",
"2.30.24",
"2.30.22",
"2.30.23",
"2.30.21",
"2.30.20",
"2.30.18",
"2.30.17",
"2.30.16",
"2.30.15",
"2.30.14",
"2.30.13",
"2.30.12",
"2.30.10",
"2.30.11",
"2.30.9",
"2.30.7",
"2.30.8",
"2.30.5",
"2.30.6",
"2.30.4",
"2.30.3",
"2.30.2",
"2.30.1",
"2.30.0",
"2.29.3",
"2.29.2",
"2.29.1",
"2.29.0",
"2.28.1",
"2.28.0",
"2.27.5",
"2.27.4",
"2.27.3",
"2.27.2",
"2.27.1",
"2.27.0",
"2.26.7",
"2.26.6",
"2.26.5",
"2.26.4",
"2.26.3",
"2.26.2",
"2.26.1",
"2.26.0",
"2.25.8",
"2.25.9",
"2.25.7",
"2.25.6",
"2.25.5",
"2.25.4",
"2.25.3",
"2.25.2",
"2.25.1",
"2.25.0",
"2.24.1",
"2.24.0",
"2.23.16",
"2.23.15",
"2.23.14",
"2.23.13",
"2.23.12",
"2.23.11",
"2.23.10",
"2.23.9",
"2.23.8",
"2.23.7",
"2.23.6",
"2.23.5",
"2.23.4",
"2.23.3",
"2.23.2",
"2.23.1",
"2.23.0",
"2.22.3",
"2.22.2",
"2.22.1",
"2.22.0",
"2.21.3",
"2.21.1",
"2.21.2",
"2.21.0",
"2.20.4",
"2.20.3",
"2.20.1",
"2.20.2",
"2.20.0",
"2.19.1",
"2.19.0",
"2.18.0",
"2.17.7",
"2.17.6",
"2.17.5",
"2.17.4",
"2.17.3",
"2.17.2",
"2.17.1",
"2.17.0",
"2.16.3",
"2.16.2",
"2.16.1",
"2.16.0",
"2.15.2",
"2.15.1",
"2.14.1",
"2.15.0",
"2.14.2",
"2.14.0",
"2.13.10",
"2.13.9",
"2.13.8",
"2.13.7",
"2.13.6",
"2.13.5",
"2.13.4",
"2.13.3",
"2.13.2",
"2.13.1",
"2.13.0",
"2.12.2",
"2.12.1",
"2.12.0",
"2.11.12",
"2.11.11",
"2.11.10",
"2.11.9",
"2.11.8",
"2.11.7",
"2.11.6",
"2.11.5",
"2.11.4",
"2.11.3",
"2.11.2",
"2.11.1",
"2.11.0",
"2.10.8",
"2.10.7",
"2.10.6",
"2.10.5",
"2.10.4",
"2.10.3",
"2.10.2",
"2.10.1",
"2.10.0",
"2.9.0",
"2.8.1",
"2.8.0",
"2.7.1",
"2.7.0",
"2.6.0",
"2.5.8",
"2.5.7",
"2.5.6",
"2.5.5",
"2.5.4",
"2.5.3",
"2.5.2",
"2.5.1",
"2.5.0",
"2.4.4",
"2.4.3",
"2.4.2",
"2.4.1",
"2.4.0",
"2.3.4",
"2.3.3",
"2.3.2",
"2.3.1",
"2.3.0",
"2.2.4",
"2.2.3",
"2.2.2",
"2.2.1",
"2.2.0",
"2.1.4",
"2.1.3",
"2.1.2",
"2.1.1",
"2.1.0",
"2.0.0",
"edgr19.2.1",
"edgr19.1",
"edgr18.3",
"edgr18.2",
"edgr18.1",
"edgr17.3.1",
"edgr17.1",
"edgr16.4",
"edgr16.2.1",
"edgr16.2"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-42796.json"
}
}
],
"modified": "2026-10-28T02:30:37.610830009Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42796.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-42796",
"https://www.vulncheck.com/advisories/arelle-unauthenticated-rce-via-rest-configure",
"https://github.com/Arelle/Arelle/pull/2320",
"https://github.com/Arelle/Arelle/releases/tag/2.39.10"
],
"provider_metadata": {
"cwe_ids": [
"CWE-306"
],
"cna_assigner": "VulnCheck",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42796.json"
}
},
"related_cves": [
{
"value": "CVE-2026-42796",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 504775,
"published_at": "2026-05-04T17:19:43.02+00:00"
}