---
id: CVE-2026-54689
title: >-
  mcp-searxng is a Model Context Protocol server that gives AI assistants web
  search and URL-reading capabilities through SearXNG
summary: >-
  mcp-searxng is a Model Context Protocol server that gives AI assistants web
  search and URL-reading capabilities through SearXNG. Prior to 1.2.0, the
  web_url_read URL policy in src/url-reader.ts can be bypassed while
  MCP_HTTP_HARDEN is en…
severity: medium
cvss: 6.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N'
cwe:
  - CWE-200
  - CWE-918
vendor: ihor-sokoliuk
product: mcp-searxng
affected:
  - mcp-searxng < 1.2.0
patched:
  - mcp-searxng 1.2.1
published: '2026-09-15'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:16:44.163'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-54689'
references:
  - url: >-
      https://github.com/ihor-sokoliuk/mcp-searxng/commit/48e5ecdcb4166a60b94c252dbe74b0a318110ac4
    label: security-advisories@github.com
  - url: 'https://github.com/ihor-sokoliuk/mcp-searxng/pull/79'
    label: security-advisories@github.com
  - url: 'https://github.com/ihor-sokoliuk/mcp-searxng/releases/tag/v1.2.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/ihor-sokoliuk/mcp-searxng/security/advisories/GHSA-wppf-h75h-6pm6
    label: security-advisories@github.com
  - url: >-
      https://github.com/ihor-sokoliuk/mcp-searxng/security/advisories/GHSA-wppf-h75h-6pm6
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/ihor-sokoliuk/mcp-searxng/releases/tag/v1.2.1'
  - url: 'https://github.com/advisories/GHSA-wppf-h75h-6pm6'
tags:
  - nvd
  - cve.org
  - exploit-available
  - ghsa
  - npm
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-17T16:39:07.455831Z'
epss: 0.0019
epssPercentile: 0.07678
aliases:
  - GHSA-wppf-h75h-6pm6
ecosystem: npm
ingestedAt: '2026-08-19T19:44:02.661Z'
---

## Overview

mcp-searxng is a Model Context Protocol server that gives AI assistants web search and URL-reading capabilities through SearXNG. Prior to 1.2.0, the web_url_read URL policy in src/url-reader.ts can be bypassed while MCP_HTTP_HARDEN is enabled and MCP_HTTP_ALLOW_PRIVATE_URLS is not enabled because redirect targets are not revalidated, 0.0.0.0 is not classified as an internal address, and IPv4-mapped IPv6 literals canonicalized to hexadecimal form are not recognized. These inputs allow an attacker-influenced tool call to make the MCP server fetch loopback or internal HTTP resources and return content from local services, private APIs, service-mesh endpoints, or cloud metadata endpoints. The separate hostname-to-private-address case addressed by the earlier partial fix is not part of these residual bypasses. This issue is fixed in version 1.2.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-54689)

Affected packages:

- `mcp-searxng < 1.2.1`

Patched in:

- `mcp-searxng 1.2.1`

Source: https://github.com/advisories/GHSA-wppf-h75h-6pm6