{"record":{"id":"3dae0edd98a513de","repo":"ruvnet/ruflo","slug":"warning-localhost-private-ip-addresses-are-not-re","errorCode":null,"errorMessage":"Warning: Localhost/private IP addresses are not recommended in production.","messagePattern":"Warning: Localhost/private IP addresses are not recommended in production\\.","errorType":"console","errorClass":null,"httpStatus":null,"severity":"error","filePath":"ruflo/src/ruvocal/src/lib/utils/mcpValidation.ts","lineNumber":35,"sourceCode":"\n\ttry {\n\t\tconst url = new URL(urlString.trim());\n\n\t\t// Allow http/https only\n\t\tif (![\"http:\", \"https:\"].includes(url.protocol)) {\n\t\t\treturn null;\n\t\t}\n\n\t\t// Warn about non-HTTPS in production\n\t\tif (!dev && url.protocol === \"http:\" && browser) {\n\t\t\tconsole.warn(\n\t\t\t\t\"Warning: Connecting to non-HTTPS MCP server in production. This may expose sensitive data.\"\n\t\t\t);\n\t\t}\n\n\t\t// Block certain localhost/private IPs in production\n\t\tif (!dev && isPrivateOrLocalhost(url.hostname)) {\n\t\t\tconsole.warn(\"Warning: Localhost/private IP addresses are not recommended in production.\");\n\t\t}\n\n\t\treturn url.toString();\n\t} catch (error) {\n\t\t// Invalid URL\n\t\treturn null;\n\t}\n}\n\n/**\n * Check if hostname is localhost or a private IP\n */\nfunction isPrivateOrLocalhost(hostname: string): boolean {\n\t// Localhost checks\n\tif (\n\t\thostname === \"localhost\" ||\n\t\thostname === \"127.0.0.1\" ||\n\t\thostname === \"::1\" ||","sourceCodeStart":17,"sourceCodeEnd":53,"githubUrl":"https://github.com/ruvnet/ruflo/blob/fa13ee4ad60ac2090b1480656eb233521790d640/ruflo/src/ruvocal/src/lib/utils/mcpValidation.ts#L17-L53","documentation":"Browser-side console warning from validateMcpServerUrl: the MCP server hostname resolves to localhost or a private IP range in production, which is discouraged; the sanitized URL is still returned.","triggerScenarios":"Thrown at ruflo/src/ruvocal/src/lib/utils/mcpValidation.ts:35 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":["Use a public HTTPS MCP server endpoint in production instead of localhost/private IP addresses."],"exampleFix":null,"handlingStrategy":"validation","validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"fa13ee4ad60ac2090b1480656eb233521790d640","analyzedAt":"2026-08-18T21:34:22.708Z","contentChangedAt":"2026-08-18T21:34:22.708Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}