Hub/AI Security/Advisories/postmark-mcp-2025
Malicious postmark-mcp npm package BCC'd every email to an attacker
Postmark says the package was not theirs; version 1.0.16 (released Sep 17, 2025) added a BCC to an attacker domain. Snyk tracks it as SNYK-JS-POSTMARKMCP-13052679.
| Published | Sep 25, 2025 |
|---|---|
| Severity | Not Rated |
| CVE | None assigned |
| Status | resolved |
| Affected | Not listed |
| Fixed in | Not listed |
| Component | npm postmark-mcp 1.0.16+ (unofficial) |
Sources
- https://postmarkapp.com/blog/information-regarding-malicious-postmark-mcp-package/
- https://security.snyk.io/vuln/SNYK-JS-POSTMARKMCP-13052679
Checked 2026-11-04. We copy severity and fix versions from the source and never estimate them.
Affected tools
Weekly, free
What changed in AI integrations
One short email when MCP clients, plugin ecosystems, IDE integrations, AI plan prices or security advisories change. Every item is sourced.