CVE-2026-73844 CKAN MCP Server: Information disclosure via verbose error reflection
Attackers can obtain sensitive internal details like hostnames and stack traces via verbose error messages in CKAN MCP Server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-73844?
CVE-2026-73844 is a low-severity vulnerability in ondata ckan-mcp-server, published on 14 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-73844?
2 open source packages ship an affected version, including @aborruso/ckan-mcp-server.
| Package | Affected | Fixed in |
|---|---|---|
@aborruso/ckan-mcp-server npm | All versions | 0.4.112 |
@aborruso/ckan-mcp-server npm | All versions | 0.4.112 |
How do I fix CVE-2026-73844?
Upgrade @aborruso/ckan-mcp-server to 0.4.112 or later.
Is CVE-2026-73844 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73844 exists.
Sources
Also known as GHSA-6f9w-9hf2-5rg3.