Vulnerability · Published Aug 14, 2026 · Assigned by GitHub_M

CVE-2026-73845CKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`)

Medium 5.3

In plain English

A medium-severity improper input validation in ckan-mcp-server from ondata. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 67.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	@aborruso/ckan-mcp-server	0.4.112	GHSA-83x6-42hr-jc76

Affected products (as reported)

Vendor	Product	Versions
ondata	ckan-mcp-server	< 0.4.112

Weakness: CWE-20, CWE-625, CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-83x6-42hr-jc76 x_refsource_CONFIRM
https://github.com/ondata/ckan-mcp-server/commit/8e1522f9bbfa1f3b21550f17887f60f133e24151 x_refsource_MISC
https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.112 x_refsource_MISC