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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-73846
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-14 17:20:36 UTC
Updated2026-08-14 17:20:36 UTC
DescriptionCKAN 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Problem Types: CWE-345 | CWE-436 | CWE-345 CWE-345: Insufficient Verification of Data Authenticity | CWE-436 CWE-436: Interpretation Conflict

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Ondata Ckan-mcp-server affected < 0.4.112 Not specified

References

ReferenceSourceLinkTags
github.com/ondata/ckan-mcp-server/releases/tag/v0.4.112 [email protected] github.com
github.com/ondata/ckan-mcp-server/security/advisories/GHSA-78x9-fhhx-v2g6 [email protected] github.com
github.com/ondata/ckan-mcp-server/commit/8e1522f9bbfa1f3b21550f17887f60f... [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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