CVE-2026-49857

auth-fetch-mcp is an MCP server that lets AI assistants fetch content from authenticated web pages. Version 3.0.1 implements SSRF protection in assertSafeUrl src/security.ts to block requests to private and loopback addresses. However, the isPrivateV6 function fails to detect IPv4-mapped IPv6...

CVE-2026-49857

auth-fetch-mcp is an MCP server that lets AI assistants fetch content from authenticated web pages. Version 3.0.1 implements SSRF protection in assertSafeUrl src/security.ts to block requests to private and loopback addresses. However, the isPrivateV6 function fails to detect IPv4-mapped IPv6...

CVE-2026-49857

auth-fetch-mcp has an SSRF protection bypass via IPv4-mapped IPv6 loopback. The root cause is in isPrivateV6() handling of hex-normalized IPv4-mapped addresses; input like http://[::ffff:127.0.0.1]:PORT/ becomes http://[::ffff:7f00:1]:PORT/ and net.isIPv4 returns false, allowing requests to priva...

EUVD-2026-58054

auth-fetch-mcp is an MCP server that lets AI assistants fetch content from authenticated web pages. Version 3.0.1 implements SSRF protection in assertSafeUrl src/security.ts to block requests to private and loopback addresses. However, the isPrivateV6 function fails to detect IPv4-mapped IPv6...

CVE-2026-49857 auth-fetch-mcp has SSRF Protection Bypass via IPv4-mapped IPv6 Loopback

auth-fetch-mcp is an MCP server that lets AI assistants fetch content from authenticated web pages. Version 3.0.1 implements SSRF protection in assertSafeUrl src/security.ts to block requests to private and loopback addresses. However, the isPrivateV6 function fails to detect IPv4-mapped IPv6...

CVE-2026-49857 auth-fetch-mcp has SSRF Protection Bypass via IPv4-mapped IPv6 Loopback

auth-fetch-mcp is an MCP server that lets AI assistants fetch content from authenticated web pages. Version 3.0.1 implements SSRF protection in assertSafeUrl src/security.ts to block requests to private and loopback addresses. However, the isPrivateV6 function fails to detect IPv4-mapped IPv6...

CVE-2026-49857

auth-fetch-mcp is an MCP server that lets AI assistants fetch content from authenticated web pages. Version 3.0.1 implements SSRF protection in "assertSafeUrl" "src/security.ts" to block requests to private and loopback addresses. However, the "isPrivateV6" function fails to detect IPv4-mapped IP...

CVE-2026-49857: Server-Side Request Forgery (SSRF)

auth-fetch-mcp is an MCP server that lets AI assistants fetch content from authenticated web pages. Version 3.0.1 implements SSRF protection in assertSafeUrl src/security.ts to block requests to private and loopback addresses. However, the isPrivateV6 function fails to detect IPv4-mapped IPv6...

NPM: auth-fetch-mcp has SSRF Protection Bypass via IPv4-mapped IPv6 Loopback

NPM: auth-fetch-mcp has SSRF Protection Bypass via IPv4-mapped IPv6 Loopback vulnerability discovered by ? in WordPress Npm auth-fetch-mcp versions = 3.0.1...

Server-side Request Forgery (SSRF)

Overview auth-fetch-mcp is a MCP server that lets AI read Notion, Google Docs, Jira & any login-protected page via a real browser Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the isPrivateV6 function, which fails to properly detect IPv4-mapped IPv6...

NPM: auth-fetch-mcp: SSRF and disk exfiltration via unvalidated auth_fetch and download_media URLs

NPM: auth-fetch-mcp: SSRF and disk exfiltration via unvalidated authfetch and downloadmedia URLs vulnerability discovered by ? in WordPress Npm auth-fetch-mcp versions = 3.0.0...

PT-2026-44918

SSRF + disk-exfil in download media and auth fetch tools — ymw0407/auth-fetch-mcp Severity The download media and auth fetch MCP tools accept arbitrary URLs and reach them as the MCP server process, with download media additionally persisting the fetched response body to a user-controlled output...