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[ CVE-2026-62264 · Published 30 Oct 2026 ]

@sylphx/pdf-reader-mcp: HTTP transport accepts unauthenticated requests despite a configured MCP_API_KEY

CVSS 7.5 EPSS <1%Fix available

[ Description ]Official description

PDF Reader MCP is a Model Context Protocol server for reading PDF documents. In versions 2.2.0 and later prior to 3.0.1, when `MCP_TRANSPORT=http` enables the opt-in HTTP server, `@sylphx/pdf-reader-mcp` reads `MCP_API_KEY` and logs that `X-API-Key` authentication is enabled but never validates the `X-API-Key` header on incoming requests. The `/mcp` endpoint consequently accepts unauthenticated clients. With the default bind address of `0.0.0.0`, any client able to reach the port can invoke every PDF tool and read any PDF the server process can open on the host, despite the misleading authentication-enabled startup log. URL-based sources additionally permit limited server-side request forgery; private and loopback destinations are blocked by default unless `--allow-private-ips` is set. The default `stdio` transport is unaffected. This issue is fixed in version 3.0.1.

[ Fixes ]Fixes and patches

  • @sylphx/pdf-reader-mcp 3.0.1Fixed version · GitHub Advisories · npm package @sylphx/pdf-reader-mcp: upgrade to 3.0.1 or later (affected >= 2.2.0, < 3.0.1)

[ Packages ]Affected open-source packages

  • @sylphx/pdf-reader-mcp npmAffected >= 2.2.0, < 3.0.1 · fixed in 3.0.1 · GHSA-q344-5v34-gm84

[ References ]References