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CVE-2026-73844— CKAN MCP Server: Information disclosure via verbose error reflection

Quick assessment

Affected
ondata ckan-mcp-server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

onData CKAN MCP Server是onData组织开源的一款基于模型上下文协议的数据服务组件。 onData CKAN MCP Server 0.4.112之前版本存在信息泄露漏洞，该漏洞源于错误路径未对错误消息进行清理，将原始上游响应体和内部异常消息直接返回给调用者，可能导致主机名、内部IP、数据库错误、堆栈片段等敏感信息泄露。

CVSS 3.7 · Low EPSS 0.36% · P28

Affected Version Matrix 1

VendorProduct Version RangeStatus
ondata ckan-mcp-server < 0.4.112 affected
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I. Basic Information for CVE-2026-73844

Vulnerability Information
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Vulnerability Title
CKAN MCP Server: Information disclosure via verbose error reflection
Source: CVE Program / CVE List V5
Vulnerability Description
CKAN MCP Server is a tool for querying CKAN open data portals. Prior to 0.4.112, error paths reflect raw upstream response bodies and internal exception messages back to the caller instead of a sanitized, generic message. When the server is pointed at (or redirected/SSRF'd to) a host that returns a non-CKAN response, or when an internal exception occurs, the caller receives verbatim upstream content and internal detail (hostnames, internal IPs, DB errors, stack fragments). This vulnerability is fixed in 0.4.112.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过错误消息导致的信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
onData CKAN MCP Server 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
onData CKAN MCP Server是onData组织开源的一款基于模型上下文协议的数据服务组件。 onData CKAN MCP Server 0.4.112之前版本存在信息泄露漏洞，该漏洞源于错误路径未对错误消息进行清理，将原始上游响应体和内部异常消息直接返回给调用者，可能导致主机名、内部IP、数据库错误、堆栈片段等敏感信息泄露。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ondata ckan-mcp-server < 0.4.112 -

II. Public POCs for CVE-2026-73844

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III. Intelligence Information for CVE-2026-73844

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Patches & Fixes for CVE-2026-73844 (2)

Vendor Advisories for CVE-2026-73844 (1)

Same Patch Batch · ondata · 2026-08-14 · 3 CVEs total

CVE-2026-73846 6.5 MEDIUM CKAN MCP Server: Cache-key canonicalization collision enables cache confusion / poisoning
CVE-2026-73845 5.3 MEDIUM CKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`)

IV. Related Vulnerabilities

Same product: ckan-mcp-server
Same vendor: ondata
Same weakness: CWE-209

V. Comments for CVE-2026-73844

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