# 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.

- **Severity:** Low 3.7 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 14 Aug 2026
- **Updated:** 18 Aug 2026
- **Also known as:** GHSA-6f9w-9hf2-5rg3

## 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.

Weakness: CWE-210 (Self-generated Error Message Containing Sensitive Information), CWE-209 (Generation of Error Message Containing Sensitive Information)

## Which versions are affected by CVE-2026-73844?

2 open source packages ship an affected version, including @aborruso/ckan-mcp-server.


| Package | Ecosystem | 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.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-73844 and fix it if it is affected.

What it is: 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.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-73844 exists.

Affected packages and fixed versions:
- @aborruso/ckan-mcp-server (npm): affected all versions; fixed in 0.4.112
- @aborruso/ckan-mcp-server (npm): affected all versions; fixed in 0.4.112

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-73844/ (Markdown: https://insights.sbomify.com/CVE-2026-73844/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-73844
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-73844
- OSV: https://osv.dev/vulnerability/CVE-2026-73844

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-73844/
Summaries are generated and may contain mistakes; the official description above is the record.