---
id: CVE-2026-73846
title: CKAN MCP Server is a tool for querying CKAN open data portals
summary: >-
  CKAN MCP Server is a tool for querying CKAN open data portals. Prior to
  0.4.112, canonicalizeParams in src/utils/cache.ts serializes request
  parameters with unescaped ampersand, equals-sign, and vertical-bar delimiters,
  allowing differen…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N'
cwe:
  - CWE-345
  - CWE-436
vendor: aborruso
product: '@aborruso/ckan-mcp-server'
affected:
  - '@aborruso/ckan-mcp-server < 0.4.112'
patched:
  - '@aborruso/ckan-mcp-server 0.4.112'
published: '2026-08-14'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:09:01.757'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73846'
references:
  - url: >-
      https://github.com/ondata/ckan-mcp-server/commit/8e1522f9bbfa1f3b21550f17887f60f133e24151
    label: security-advisories@github.com
  - url: 'https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.112'
    label: security-advisories@github.com
  - url: >-
      https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-78x9-fhhx-v2g6
    label: security-advisories@github.com
  - url: >-
      https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-78x9-fhhx-v2g6
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73846'
  - url: 'https://github.com/advisories/GHSA-78x9-fhhx-v2g6'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00194
epssPercentile: 0.0807
aliases:
  - GHSA-78x9-fhhx-v2g6
ecosystem: npm
ingestedAt: '2026-09-03T15:04:38.619Z'
---

## Overview

CKAN MCP Server is a tool for querying CKAN open data portals. Prior to 0.4.112, canonicalizeParams in src/utils/cache.ts serializes request parameters with unescaped ampersand, equals-sign, and vertical-bar delimiters, allowing different logical parameter sets used by buildCacheKey to collide and an attacker to prime a shared cache with a response for a victim's distinct query. This issue is fixed in version 0.4.112.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-73846)

Affected packages:

- `@aborruso/ckan-mcp-server < 0.4.112`

Patched in:

- `@aborruso/ckan-mcp-server 0.4.112`

Source: https://github.com/advisories/GHSA-78x9-fhhx-v2g6