What is CVE-2026-27492?

CVE-2026-27492 is a medium-severity vulnerability in Lettermint Lettermint-node, classified under CWE-488. CVSS score: 4.7/10. Published 2026-02-21.

How severe is CVE-2026-27492?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Vulnerability in Lettermint Lettermint-node

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…

EPSS: 0.000 (0.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Lettermint Lettermint-node — versions < 1.5.1

Weakness classification (CWE)

CWE-488

References

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

Frequently asked questions

What is CVE-2026-27492?: CVE-2026-27492 is a medium-severity vulnerability in Lettermint Lettermint-node, classified under CWE-488. CVSS score: 4.7/10. Published 2026-02-21.
How severe is CVE-2026-27492?: Medium severity. CVSS v3 base score is 4.7 out of 10.