PDF Reader MCP: HTTP transport accepts unauthenticated requests despite a configured MCP_API_KEY

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-62264
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-30 19:18:32 UTC
Updated2026-10-30 19:39:14 UTC
DescriptionPDF 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.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.004520000 probability, percentile 0.392840000 (date 2026-11-01)

Problem Types: CWE-200 | CWE-287 | CWE-306 | CWE-200 CWE-200: Exposure of Sensitive Information to an Unauthorized Actor | CWE-287 CWE-287: Improper Authentication | CWE-306 CWE-306: Missing Authentication for Critical Function

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA SylphxAI Pdf-reader-mcp affected >= 2.2.0, < 3.0.1 Not specified

References

ReferenceSourceLinkTags
github.com/SylphxAI/anymd/commit/4c35f72862d729301e3912ab8c8317d2828cf4c2 [email protected] github.com
github.com/SylphxAI/anymd/security/advisories/GHSA-q344-5v34-gm84 [email protected] github.com
github.com/SylphxAI/anymd/tree/v3.0.1 [email protected] github.com
github.com/SylphxAI/anymd/pull/332 [email protected] github.com
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