medium6.5
CVE-2026-73846
CKAN MCP Server: Cache-key canonicalization collision enables cache confusion / poisoning
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @aborruso/ckan-mcp-server | < 0.4.112 | 0.4.112 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-78x9-fhhx-v2g6
- https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-78x9-fhhx-v2g6
- https://nvd.nist.gov/vuln/detail/CVE-2026-73846
- https://github.com/ondata/ckan-mcp-server/commit/8e1522f9bbfa1f3b21550f17887f60f133e24151
- https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.112