{"id":"CVE-2026-54689","revision":"058de6adbfc1408cb1f5ebf626ccb896","records":[{"revision":"058de6adbfc1408cb1f5ebf626ccb896","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-54689","aliases":[],"title":"mcp-searxng hardened-mode SSRF bypasses permit internal URL access","description":"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.","state":0,"publishedAt":"2026-09-15T17:45:19.132+00:00","modifiedAt":"2026-09-17T16:39:46.212+00:00","affected":[{"ecosystem":"Vendor product","name":"mcp-searxng","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"ihor-sokoliuk\",\n                    \"product\": \"mcp-searxng\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.2.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N","score":6.3,"severity":"MEDIUM"}],"references":["https://github.com/ihor-sokoliuk/mcp-searxng/security/advisories/GHSA-wppf-h75h-6pm6","https://github.com/ihor-sokoliuk/mcp-searxng/pull/79","https://github.com/ihor-sokoliuk/mcp-searxng/commit/48e5ecdcb4166a60b94c252dbe74b0a318110ac4","https://github.com/ihor-sokoliuk/mcp-searxng/releases/tag/v1.2.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-54689","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-54689","identifiers":["CVE-2026-54689"]},"retained":false,"historicalAffected":[]}],"coverage":[]}