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CVE-2026-58485— mcp-searxng: DNS-resolved Private Hostname SSRF in `web_url_read`

Quick assessment

Affected
ihor-sokoliuk mcp-searxng
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.

mcp-searxng 是一个模型上下文协议（MCP）服务器，它通过 SearXNG 为 AI 助手提供网页搜索和 URL 内容读取功能。在 1.7.1 版本之前， 功能从 中接收由调用者控制的 URL，并在 中的 函数内仅对字面量的主机名进行验证，随后 执行操作系统级别的 DNS 解析。因此，一个看似公共的、由攻击者控制的主机名若解析到私有地址、回环地址、链路本地地址或云元数据地址，便可绕过该词法检查，导致 MCP 服务器连接到内部目标。 在默认的 HTTP 配置下，未经身份验证的网络客户端可利用此漏洞路径读取内

CVSS 7.1 · High

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
ihor-sokoliuk mcp-searxng < 1.7.1 affected
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I. Basic Information for CVE-2026-58485

Vulnerability Information
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Vulnerability Title
mcp-searxng: DNS-resolved Private Hostname SSRF in `web_url_read`
Source: CVE Program / CVE List V5
Vulnerability Description
mcp-searxng is a Model Context Protocol server that gives AI assistants web search and URL-reading capabilities through SearXNG. Prior to 1.7.1, web_url_read receives its caller-controlled URL through src/index.ts and validates only the literal hostname in assertUrlAllowed() within src/url-reader.ts before undiciFetch() performs operating-system DNS resolution. A public-looking attacker-controlled hostname that resolves to a private, loopback, link-local, or cloud-metadata address therefore passes the lexical check and causes the MCP server to connect to the internal destination. In the default HTTP configuration, an unauthenticated network client can use this path to read internal services, expose credentials or service tokens, and enumerate reachable internal hosts; in STDIO deployments, prompt-influenced tool selection can provide the malicious URL. Direct private IP literals are blocked, and MCP_HTTP_ALLOW_PRIVATE_URLS remains an explicit opt-out. This issue is fixed in version 1.7.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/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
ihor-sokoliuk mcp-searxng < 1.7.1 -

II. Public POCs for CVE-2026-58485

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III. Intelligence Information for CVE-2026-58485

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Patches & Fixes for CVE-2026-58485 (1)

Vendor Advisories for CVE-2026-58485 (1)

Vendor Pages for CVE-2026-58485 (1)

Same Patch Batch · ihor-sokoliuk · 2026-09-15 · 4 CVEs total

CVE-2026-58483 7.5 HIGH mcp-searxng: Unbounded Response Body Read Bypasses URL Size Limit in `web_url_read`
CVE-2026-54688 6.5 MEDIUM mcp-searxng: SSRF in web_url_read: the internal-address guard is disabled by default (MCP_
CVE-2026-54689 6.3 MEDIUM mcp-searxng hardened-mode SSRF bypasses permit internal URL access

IV. Related Vulnerabilities

Same product: mcp-searxng
Same vendor: ihor-sokoliuk
Same weakness: CWE-918

V. Comments for CVE-2026-58485

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