CVE-2026-73846

CKAN MCP Server: Cache-key canonicalization collision enables cache confusion / poisoning

State: Published
Severity: 6.5 Medium
Published: Aug 14, 2026
Updated: Aug 17, 2026
Reserved: Aug 13, 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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N	GitHub_M

Weaknesses

CWE-345 Insufficient Verification of Data Authenticity
CWE-436 Interpretation Conflict

Affected Products

Product	Versions
ckan-mcp-serverondata	< 0.4.112Affected

References

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.