CVE-2026-61612— @aborruso/ckan-mcp-server has SSRF via DNS-name → internal IP — incomplete fix of CVE-2026-53509
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.
CKAN MCP Server 是一个用于查询 CKAN 开放数据门户的工具。在版本 0.4.108 之前，SSRF 防护函数 （该函数为修复 CVE-2026-33060 而引入，并针对 CVE-2026-53509 进行了扩展）仅校验主机名字符串，从不执行 DNS 解析。因此，任何由调用方提供的 ，只要其主机名解析到内部地址，即可绕过该防护，导致服务器向回环地址（loopback）及云元数据服务（169.254.169.254）发起请求。这是对该同一防护机制的第三次绕过，且其影响范围比 CVE-2026-535
Affected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| ondata | ckan-mcp-server | @aborruso/ckan-mcp-server |
affected |
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I. Basic Information for CVE-2026-61612
Vulnerability Information
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Vulnerability Title
@aborruso/ckan-mcp-server has SSRF via DNS-name → internal IP — incomplete fix of CVE-2026-53509
Source: CVE Program / CVE List V5
Vulnerability Description
CKAN MCP Server is a tool for querying CKAN open data portals. Prior to version 0.4.108, the SSRF guard `validateServerUrl` (added for CVE-2026-33060, extended for CVE-2026-53509) validates only the hostname string and never resolves DNS. Any caller-supplied `server_url` whose hostname *resolves* to an internal address passes the guard, so the server issues requests to loopback and cloud metadata (`169.254.169.254`). This is a third bypass of the same guard, and it reaches IMDS — strictly more than CVE-2026-53509, which only reached loopback. Version 0.4.108 contains an updated fix.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| ondata | ckan-mcp-server | @aborruso/ckan-mcp-server | - |
|
II. Public POCs for CVE-2026-61612
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-61612 (1)
Vendor Advisories for CVE-2026-61612 (1)
Other References for CVE-2026-61612 (3)
IV. Related Vulnerabilities
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