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TI-2026-51867 Aliases CVE-2026-73844GHSA-6f9w-9hf2-5rg3

CKAN MCP Server: Information disclosure via verbose error reflection

Priority MEDIUM 51CWE-209Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
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-209.

Summary

CKAN MCP Server is a tool for querying CKAN open data portals. Prior to 0.4.112, error paths reflect raw upstream response bodies and internal exception messages back to the caller instead of a sanitized, generic message. When the server is pointed at (or redirected/SSRF'd to) a host that returns a non-CKAN response, or when an internal exception occurs, the caller receives verbatim upstream content and internal detail (hostnames, internal IPs, DB errors, stack fragments). This vulnerability is fixed in 0.4.112.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00355 29th 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
Poc
Automatable
No
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-6f9w-9hf2-5rg3
  • 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-6f9w-9hf2-5rg3

Remediation

  • Fix · CNA ckan-mcp-server (ondata) Fixed in 0.4.112
  • Fix · GHSA-6f9w-9hf2-5rg3 @aborruso/ckan-mcp-server (npm) Fixed in 0.4.112 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-73844
  2. 2026-10-03 Alias added: GHSA-6f9w-9hf2-5rg3

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-2026-51868 CKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`) CVSS 3.1MEDIUM 5.3
  • 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