CVE-2026-27492

Feb. 21, 2026, 11:15 a.m.

4.7
Medium

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.

Product(s) Impacted

Vendor Product Versions
Lettermint
  • Lettermint Node.js Sdk
  • 1.5.0

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-488
Exposure of Data Element to Wrong Session
The product does not sufficiently enforce boundaries between the states of different sessions, causing data to be provided to, or used by, the wrong session.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
a lettermint lettermint_node.js_sdk 1.5.0 / / / / / / /

References

https://github.com/lettermint/lettermint-node/blob/main/CHANGELOG.md#151-2026-02-20
https://github.com/lettermint/lettermint-node/commit/24a17acbc2429c5eb30391f9df3dc0ea7aaf4de1
https://github.com/lettermint/lettermint-node/security/advisories/GHSA-49pc-8936-wvfp

Tags

[email protected]
CWE-488
2026-02-21
CVE-2026-27492

CVSS Score

4.7 / 10

CVSS Data - 3.1

  • Attack Vector: LOCAL
  • Attack Complexity: HIGH
  • Privileges Required: LOW
  • Scope: UNCHANGED
  • Confidentiality Impact: HIGH
  • Integrity Impact: NONE
  • Availability Impact: NONE

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

    View Vector String

Timeline

Published: Feb. 21, 2026, 11:15 a.m.
Last Modified: Feb. 21, 2026, 11:15 a.m.

Status : Received

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.