CVE-2026-27492

MEDIUM

4.7

Description

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 previous send to leak into a subsequent one, potentially delivering content or recipient addresses to unintended parties. Applications sending emails to different recipients in sequence — such as transactional flows like password resets or notifications — are affected. This issue has been fixed in version 1.5.1.

CVE Details

CVSS v3.1 Score4.7

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack VectorLOCAL

ComplexityHIGH

Privileges RequiredLOW

User InteractionNONE

Published2/21/2026

Last Modified2/24/2026

Sourcenvd

Honeypot Sightings0

Affected Products

lettermint:lettermint

Weaknesses (CWE)

CWE-488

References

https://github.com/lettermint/lettermint-node/blob/main/CHANGELOG.md#151-2026-02-20(security-advisories@github.com)

https://github.com/lettermint/lettermint-node/commit/24a17acbc2429c5eb30391f9df3dc0ea7aaf4de1(security-advisories@github.com)

https://github.com/lettermint/lettermint-node/security/advisories/GHSA-49pc-8936-wvfp(security-advisories@github.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.