🛡️ MAL-2026-4649 — promptbook-mcp
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
Details
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| promptbook-mcp | — | — |
References
More MAL 2026 advisories
Browse all of MAL 2026 in the advisory index.
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