{"id":"CVE-2026-54688","summary":"mcp-searxng: SSRF in web_url_read: the internal-address guard is disabled by default (MCP_HTTP_HARDEN off)","details":"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.","aliases":["GHSA-q87f-qc2r-2gw4"],"modified":"2026-09-17T03:47:13.864139060Z","published":"2026-09-15T17:46:23.073Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-918"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54688.json"},"references":[{"type":"WEB","url":"https://github.com/ihor-sokoliuk/mcp-searxng/releases/tag/v1.2.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54688.json"},{"type":"ADVISORY","url":"https://github.com/ihor-sokoliuk/mcp-searxng/security/advisories/GHSA-q87f-qc2r-2gw4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54688"},{"type":"REPORT","url":"https://github.com/ihor-sokoliuk/mcp-searxng/issues/87#issuecomment-4645453694"},{"type":"FIX","url":"https://github.com/ihor-sokoliuk/mcp-searxng/commit/48e5ecdcb4166a60b94c252dbe74b0a318110ac4"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ihor-sokoliuk/mcp-searxng","events":[{"introduced":"0"},{"fixed":"48e5ecdcb4166a60b94c252dbe74b0a318110ac4"},{"fixed":"da4d43b5123dae694d6bd9c67b8ab2f19ff23cd1"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"1.2.0"}]}}],"versions":["v1.1.1","v1.1.0","v1.0.5","v1.0.4","v1.0.3","v1.0.2","v1.0.1","v1.0.0","v0.10.5","v0.10.4","v0.10.3","v0.10.1","v0.10.0","v0.9.2","v0.9.1","v0.9.0","v0.8.0","v0.7.12","v0.7.11","v0.7.10","v0.7.9","v0.7.8","v0.7.7","v0.7.6","v0.7.5","v0.7.4","v0.7.3","v0.6.0","v0.5.0","v0.4.4","v0.4.3","v0.4.2","v0.4.1","v0.4.0","v0.3.7","v0.3.6","v0.3.5","v0.3.4","v0.3.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54688.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N"}]}