# CVE-2026-73846

## Summary

- **CVE ID:** CVE-2026-73846
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N)
- **CWE:** CWE-345, CWE-436
- **Published:** Aug 14, 2026
- **Last Modified:** Aug 17, 2026

## Description

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.

## Affected Products

- ondata — ckan-mcp-server (< 0.4.112)

## References

- [CNA](https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-78x9-fhhx-v2g6)
- [CNA](https://github.com/ondata/ckan-mcp-server/commit/8e1522f9bbfa1f3b21550f17887f60f133e24151)
- [CNA](https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.112)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.14%
- **EPSS Percentile:** 3.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._