CVE-2026-73845: CKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`)
CKAN MCP Server is a tool for querying CKAN open data portals. Prior to 0.4.112, the ckangetmqaquality and ckangetmqaqualitydetails tools in src/tools/quality.ts use isValidMqaServer to validate the serverurl 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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
CKAN MCP Serverto a version that resolves this vulnerability.Fixed in 0.4.112
Event History
Frequently Asked Questions
What is the severity of CVE-2026-73845?
The severity of CVE-2026-73845 is medium with a CVSS score of 5.3.
How do I fix CVE-2026-73845?
To fix CVE-2026-73845, update to CKAN MCP Server version 0.4.112 or later.
What systems are affected by CVE-2026-73845?
CVE-2026-73845 affects versions of CKAN MCP Server prior to 0.4.112.
What type of vulnerability is CVE-2026-73845?
CVE-2026-73845 is categorized under input validation vulnerabilities and is associated with Server-Side Request Forgery (SSRF).
What issue does CVE-2026-73845 exploit?
CVE-2026-73845 exploits an unanchored regex in the isValidMqaServer function, allowing bypass of the allowlist for server_url parameters.