lettermint lettermint-node up to 1.5.0 Password Reset send wrong session

Summaryinfo

A vulnerability categorized as problematic has been discovered in lettermint lettermint-node up to 1.5.0. This vulnerability affects the function send of the component Password Reset Handler. Such manipulation leads to wrong session. This vulnerability is documented as CVE-2026-27492. The attack needs to be performed locally. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in lettermint lettermint-node up to 1.5.0 and classified as problematic. Affected by this issue is the function send of the component Password Reset Handler. The manipulation with an unknown input leads to a wrong session vulnerability. Using CWE to declare the problem leads to CWE-488. 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. Impacted is confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is handled as CVE-2026-27492 since 02/19/2026. The exploitation is known to be difficult. Local access is required to approach this attack. Technical details are known, but there is no available exploit.

Upgrading to version 1.5.1 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying the patch 24a17acbc2429c5eb30391f9df3dc0ea7aaf4de1 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• lettermint

Name

• lettermint-node

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5.0

License

• open-source

Website

• Product: https://github.com/lettermint/lettermint-node/

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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