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FKIE_CVE-2026-58485

Vulnerability from fkie_nvd - Published: 2026-09-15 18:17 - Updated: 2026-09-15 19:17
Severity
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
Summary
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.
References
security-advisories@github.comhttps://github.com/ihor-sokoliuk/mcp-searxng/commit/14575eaaa46a21391477d2b68673858ba6b52bd6
security-advisories@github.comhttps://github.com/ihor-sokoliuk/mcp-searxng/pull/120
security-advisories@github.comhttps://github.com/ihor-sokoliuk/mcp-searxng/releases/tag/v1.7.1
security-advisories@github.comhttps://github.com/ihor-sokoliuk/mcp-searxng/security/advisories/GHSA-mrvx-jmjw-vggc
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "mcp-searxng",
          "vendor": "ihor-sokoliuk",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.7.1"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-58485",
  "lastModified": "2026-09-15T19:17:31.393",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 4.0,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-58485",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-09-15T18:28:30.490970Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-09-15T18:17:26.040",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/ihor-sokoliuk/mcp-searxng/commit/14575eaaa46a21391477d2b68673858ba6b52bd6"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/ihor-sokoliuk/mcp-searxng/pull/120"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/ihor-sokoliuk/mcp-searxng/releases/tag/v1.7.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/ihor-sokoliuk/mcp-searxng/security/advisories/GHSA-mrvx-jmjw-vggc"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-918"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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