CKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`)

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-73845
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-14 17:20:36 UTC
Updated2026-08-14 18:19:09 UTC
DescriptionCKAN 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Problem Types: CWE-20 | CWE-625 | CWE-918 | CWE-20 CWE-20: Improper Input Validation | CWE-625 CWE-625: Permissive Regular Expression | CWE-918 CWE-918: Server-Side Request Forgery (SSRF)

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
3.1CNADECLARED5.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Ondata Ckan-mcp-server affected < 0.4.112 Not specified

References

ReferenceSourceLinkTags
github.com/ondata/ckan-mcp-server/security/advisories/GHSA-83x6-42hr-jc76 [email protected] github.com
github.com/ondata/ckan-mcp-server/releases/tag/v0.4.112 [email protected] github.com
github.com/ondata/ckan-mcp-server/commit/8e1522f9bbfa1f3b21550f17887f60f... [email protected] github.com
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