CVE-2026-33060

CKAN MCP Server: SSRF via base_url allows access to internal networks

MEDIUM 5.7EPSS 0.3%

CKAN MCP Server is a tool for querying CKAN open data portals. Versions prior to 0.4.85 provide tools including ckan_package_search and sparql_query that accept a base_url parameter, making HTTP requests to arbitrary endpoints without restriction. A CKAN portal client has no legitimate reason to contact cloud metadata or internal network services. There is no URL validation on base_url parameter. No private IP blocking (RFC 1918, link-local 169.254.x.x), no cloud metadata blocking. The sparql_query and ckan_datastore_search_sql tools also accept arbitrary base URLs and expose injection surfaces. An attack can lead to internal network scanning, cloud metadata theft (IAM credentials via IMDS at 169.254.169.254), potential SQL/SPARQL injection via unsanitized query parameters. Attack requires prompt injection to control the base_url parameter. This issue has been fixed in version 0.4.85.

Affected: ondata · ckan-mcp-server
CVSS v3.1 NVD: 5.7 MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
CVSS v3.1 GITHUB: 5.3 MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.31% chance of exploitation in the next 30 days, 22nd percentile
Published: 2026-03-20
Updated: 2026-03-24

Proof-of-concept exploits (1)

advisories/GHSA-3xm7-qw7j-qc8v

CVE-2026-33060

Proof-of-concept exploits (1)

Security advisories

References