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Back to active CVEs
High · CVSS 7.5CVE-2026-62264GHSA-Q344-5V34-GM84

PDF Reader MCP: HTTP transport accepts unauthenticated requests despite a configured MCP_API_KEYCVE-2026-62264

Answer in brief

CVE-2026-62264 records a High severity (CVSS 7.5) vulnerability in PDF Reader MCP: HTTP transport accepts unauthenticated requests despite a configured MCP_API_KEY. The current sources do not mark it as known exploited. The current feed maps SylphxAI/pdf-reader-mcp (generic), @sylphx/pdf-reader-mcp (npm), @sylphx/pdf-reader-mcp (npm). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 30, 2026Updated Oct 30, 2026Source checked Oct 30, 2026First seen by HOL Oct 29, 2026Material review Oct 30, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
3 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps SylphxAI/pdf-reader-mcp (generic), @sylphx/pdf-reader-mcp (npm), @sylphx/pdf-reader-mcp (npm). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
SylphxAI/pdf-reader-mcpgeneric>=2.2.0 <3.0.13.0.1
@sylphx/pdf-reader-mcpnpm>=2.2.0,<3.0.13.0.1
@sylphx/pdf-reader-mcpnpm>=2.2.0,<3.0.13.0.1

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for SylphxAI/pdf-reader-mcp, @sylphx/pdf-reader-mcp, @sylphx/pdf-reader-mcp.
  2. 2Review the reported fix. Update SylphxAI/pdf-reader-mcp to 3.0.1; @sylphx/pdf-reader-mcp to 3.0.1; @sylphx/pdf-reader-mcp to 3.0.1 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 29, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Arbitrary File Read
EPSS
Not reported
CWE IDs
CWE-200, CWE-287, CWE-306
Source
CVE List V5
Source checked
Oct 30, 2026
References
7 linked sources
Open source record