Medium
CKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`)
Type: advisorySources: OSV
CKAN MCP Server is a tool for querying CKAN open data portals. Prior to 0.4.112, the ckan_get_mqa_quality and ckan_get_mqa_quality_details tools in src/tools/quality.ts use isValidMqaServer to validate the server_url parameter with a prefix-only regular expression for dati.gov.it, allowing suffix-host and URL-userinfo values to target an attacker-controlled host and return a spoofed response. This issue is fixed in version 0.4.112.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-73845
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 4 Nov 2026, 22:26 UTC · Revision 1
Source evidence
CKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`)
core-osv · Original sourcePublished 14 Aug 2026, 16:45 UTC
CKAN MCP Server is a tool for querying CKAN open data portals. Prior to 0.4.112, the ckan_get_mqa_quality and ckan_get_mqa_quality_details tools in src/tools/quality.ts use isValidMqaServer to validate the server_url parameter with a prefix-only regular expression for dati.gov.it, allowing suffix-host and URL-userinfo values to target an attacker-controlled host and return a spoofed response. This issue is fixed in version 0.4.112.
osv:CVE-2026-73845
Complete source record
{
"id": "33d9aec43e9363f575c5f4ad8a648064d97b9ea2abbb2c9880dd8247c054060e",
"url": "https://osv.dev/vulnerability/CVE-2026-73845",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`)",
"summary": "CKAN MCP Server is a tool for querying CKAN open data portals. Prior to 0.4.112, the ckan_get_mqa_quality and ckan_get_mqa_quality_details tools in src/tools/quality.ts use isValidMqaServer to validate the server_url parameter with a prefix-only regular expression for dati.gov.it, allowing suffix-host and URL-userinfo values to target an attacker-controlled host and return a spoofed response. This issue is fixed in version 0.4.112.",
"evidence": "osv:CVE-2026-73845",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-73845",
"aliases": [
"CVE-2026-73845",
"GHSA-83x6-42hr-jc76"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/ondata/ckan-mcp-server",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "3b827af72b228d42aa7b0d7dac5347d16af3f4e5"
},
{
"fixed": "8e1522f9bbfa1f3b21550f17887f60f133e24151"
}
],
"database_specific": {
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "0.4.112"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "8e1522f9bbfa1f3b21550f17887f60f133e24151"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "3b827af72b228d42aa7b0d7dac5347d16af3f4e5"
}
],
"source": "REFERENCES_TAG",
"original_tag": "v0.4.112"
}
]
}
}
],
"versions": [
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"v0.4.107",
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73845.json"
}
}
],
"modified": "2026-10-28T02:30:39.987339495Z",
"provider": "osv",
"references": [
"https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.112",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73845.json",
"https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-83x6-42hr-jc76",
"https://nvd.nist.gov/vuln/detail/CVE-2026-73845",
"https://github.com/ondata/ckan-mcp-server/commit/8e1522f9bbfa1f3b21550f17887f60f133e24151"
],
"provider_metadata": {
"cwe_ids": [
"CWE-20",
"CWE-625",
"CWE-918"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73845.json"
}
},
"related_cves": [
{
"value": "CVE-2026-73845",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 507606,
"published_at": "2026-08-14T16:45:06.714+00:00"
}