CVE-2026-54688: Ihor-Sokoliuk Mcp-Searxng

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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, web_url_read passes a caller-supplied URL to the server-side fetch path while assertUrlAllowed() in src/url-reader.ts runs only when MCP_HTTP_HARDEN is enabled, even though MCP_HTTP_HARDEN is disabled by default in src/http-security.ts. In the default configuration, an attacker who influences the URL selected by a user or AI agent can make the server fetch loopback, private-network, or cloud metadata endpoint resources and return their contents into the model context. file:// URLs remain rejected, and the separate DNS-resolution and redirect-validation bypasses are outside this record. This issue is fixed in version 1.2.0.

Affected products

• Ihor-Sokoliuk Mcp-Searxng: before 1.2.0 (fixed in 1.2.0)

Published 2026-09-15. Last modified 2026-09-30.