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TI-2026-51868 Aliases CVE-2026-73845GHSA-83x6-42hr-jc76

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

Priority LOW 30CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-918 and the CVSS impact.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00384 32nd percentileScored 2026-11-07
Fix Fixed ckan-mcp-server (ondata): 0.4.112@aborruso/ckan-mcp-server (npm): 0.4.112

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ondatackan-mcp-serverbefore 0.4.1120.4.112Patch availableCNA
—@aborruso/ckan-mcp-server (npm)before 0.4.1120.4.112Patch availableGHSA-83x6-42hr-jc76
  • ckan-mcp-server Vendorondata Affected before 0.4.112 Fixed in 0.4.112 Patch available CNA
  • @aborruso/ckan-mcp-server (npm) Vendor— Affected before 0.4.112 Fixed in 0.4.112 Patch available GHSA-83x6-42hr-jc76

Remediation

  • Fix · CNA ckan-mcp-server (ondata) Fixed in 0.4.112
  • Fix · GHSA-83x6-42hr-jc76 @aborruso/ckan-mcp-server (npm) Fixed in 0.4.112 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-73845
  2. 2026-10-03 Alias added: GHSA-83x6-42hr-jc76

References

Advisory 1

Other 4

  • TI-2026-51869 CKAN MCP Server: Cache-key canonicalization collision enables cache confusion / poisoning CVSS 3.1MEDIUM 6.5
  • TI-2026-25502 CKAN MCP Server: SSRF via base_url allows access to internal networks CVSS 3.1MEDIUM 5.7
  • TI-2026-51867 CKAN MCP Server: Information disclosure via verbose error reflection CVSS 3.1LOW 3.7
  • TI-2026-44132 @aborruso/ckan-mcp-server has SSRF via DNS-name → internal IP — incomplete fix of CVE-2026-53509 CVSS 3.1MEDIUM 5.7
  • TI-2026-38583 @aborruso/ckan-mcp-server: SSRF via base_url allows access to internal networks (Potential fix bypass of CVE-2026-33060) CVSS 3.1MEDIUM 5.7
  • TI-2026-84568 Missing origin checks in CKAN MCP Server DataStore table UI CVSS 3.1LOW 3.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences