CVE-2026-73845

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

State: Published
Severity: 5.3 Medium
Published: Aug 14, 2026
Updated: Aug 14, 2026
Reserved: Aug 13, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N	GitHub_M

Weaknesses

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

Affected Products

Product	Versions
ckan-mcp-serverondata	< 0.4.112Affected

References

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