CVE-2026-73846: medium-severity vulnerability in ondata ckan-mcp-server
CKAN MCP Server: Cache-key canonicalization collision enables cache confusion / poisoning
Published · Updated
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13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.2%
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N
Affected products
ondata · ckan-mcp-serverRelated CVEs — ondata ckan-mcp-server
In the same product, most dangerous first.
CVE-2026-61612MEDIUM@aborruso/ckan-mcp-server has SSRF via DNS-name → internal IP — incomplete fix of CVE-2026-53509EPSS 0.4%CVE-2026-53509MEDIUM@aborruso/ckan-mcp-server: SSRF via base_url allows access to internal networks (Potential fix bypass of CVE-2026-33060)EPSS 0.4%CVE-2026-73845MEDIUMCKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`)EPSS 0.4%CVE-2026-73844LOWCKAN MCP Server: Information disclosure via verbose error reflectionEPSS 0.4%CVE-2026-33060MEDIUMCKAN MCP Server: SSRF via base_url allows access to internal networksEPSS 0.3%CVE-2026-76894LOWCKAN MCP Server: DataStore Table UI resource does not validate postMessage origin (in) and posts to targetOrigin "*" (out)EPSS 0.2%