CKAN MCP Server: Cache-key canonicalization collision enables cache confusion / poisoning
Priority MEDIUM 62CWE-345Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- Low · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-345.
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 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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00194 9th percentileScored 2026-11-07
Fix Fixed ckan-mcp-server (ondata): 0.4.112@aborruso/ckan-mcp-server (npm): 0.4.112
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| ondata | ckan-mcp-server | before 0.4.112 | 0.4.112 | Patch available | CNA |
| — | @aborruso/ckan-mcp-server (npm) | before 0.4.112 | 0.4.112 | Patch available | GHSA-78x9-fhhx-v2g6 |
- ckan-mcp-server Vendorondata Affected before 0.4.112 Fixed in 0.4.112 Patch available CNA
- @aborruso/ckan-mcp-server (npm) Vendor— Affected before 0.4.112 Fixed in 0.4.112 Patch available GHSA-78x9-fhhx-v2g6
Remediation
- Fix · CNA ckan-mcp-server (ondata) Fixed in 0.4.112
- Fix · GHSA-78x9-fhhx-v2g6 @aborruso/ckan-mcp-server (npm) Fixed in 0.4.112 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2026-73846
- 2026-10-03 Alias added: GHSA-78x9-fhhx-v2g6
References
More ondata vulnerabilities
- TI-2026-25502 CKAN MCP Server: SSRF via base_url allows access to internal networks CVSS 3.1MEDIUM 5.7
- TI-2026-51867 CKAN MCP Server: Information disclosure via verbose error reflection CVSS 3.1LOW 3.7
- TI-2026-51868 CKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`) CVSS 3.1MEDIUM 5.3
- TI-2026-44132 @aborruso/ckan-mcp-server has SSRF via DNS-name → internal IP — incomplete fix of CVE-2026-53509 CVSS 3.1MEDIUM 5.7
- TI-2026-38583 @aborruso/ckan-mcp-server: SSRF via base_url allows access to internal networks (Potential fix bypass of CVE-2026-33060) CVSS 3.1MEDIUM 5.7
- TI-2026-84568 Missing origin checks in CKAN MCP Server DataStore table UI CVSS 3.1LOW 3.1
Sources
- CVE-2026-73846 · CVE Program
- CVE-2026-73846 · NVD
- FIRST EPSS
- GHSA-78x9-fhhx-v2g6 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences