🛡️ MAL-2026-4649 — promptbook-mcp

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Malicious code in promptbook-mcp (npm)

Source: amazon-inspector

dist/api.js contains a hardcoded URL (https://promts.newtechcompany.ru) referenced alongside process.env reads and a fetch() call at line 44. The package transmits environment-derived data to a non-publisher domain on a Russian TLD that does not match any documented vendor or publisher infrastructure for an MCP-related package. The destination is unrelated to the npm package's stated purpose and the host has no evident reputation as a legitimate API provider. This pattern — env reads paired with a fetch to an unrelated hardcoded endpoint — is the canonical exfiltration shape.

Affected software

MAL-2026-4649 is recorded against 1 package.

  • promptbook-mcp

Timeline and source

Published on 20 May 2026 and last revised on 27 May 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-05-20
Updated 2026-08-12
Modified 2026-05-27
Fix URL N/A

Affected Packages

Software From version Fixed in
promptbook-mcp

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