CVE-2026-27492

Lettermint Node.js SDK is the official Node.js SDK for Lettermint. In versions 1.5.0 and below, email properties such as to, subject, html, text, and attachments are not reset between sends when a single client instance is reused across multiple .send calls. This can cause properties from a...

Lettermint Node.js SDK leaks email properties to unintended recipients when client instance is reused

Impact Email properties such as to, subject, html, text, and attachments are not reset between sends when a single client instance is reused across multiple .send calls. This can cause properties from a previous send to leak into a subsequent one, potentially delivering content or recipient...