{"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":0.00134,"epssPercentile":0.0327,"aliases":["GHSA-wppf-h75h-6pm6"],"ecosystem":"npm","ingestedAt":"2026-08-19T19:44:02.661Z","slug":"CVE-2026-54689","body":"## Overview\n\nmcp-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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-54689)\n\nAffected packages:\n\n- `mcp-searxng < 1.2.1`\n\nPatched in:\n\n- `mcp-searxng 1.2.1`\n\nSource: https://github.com/advisories/GHSA-wppf-h75h-6pm6","depth":"twilight","depthScore":47,"depthScoreParts":{"impact":34.7,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":206464,"id":"CVE-2026-54689","ts":1789665847300,"field":"exploit_available","old":"false","new":"true"}]}