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lettermint

Open actionable advisories and recorded vendor fixes. This public package view has no inventory attached and cannot establish whether your deployment is affected. A vendor fix never resolves your finding; verify your installed version and the source guidance.

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1 actionable advisory, newest first. Withdrawn advisories and news are excluded. Coverage is partial.

  1. Medium, CVSS 4.7npmAmendedPublished

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

    CVE-2026-27492 · GHSA-49pc-8936-wvfp

    Affected
    • npm lettermint < 1.5.1
    Fixed in
    1.5.1· Vendor fix available
    Issue
    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 addresses to unintended parties. Applications sending emails to different recipients in sequence — such as transactional flows like password resets or notifications — are affected. Patches Yes, the issue has been patched. Users should upgrade to v1.5.1 or later. Workarounds If upgrading immediately is not possible, instantiate a new client for each send: This ensures no state is carried over between sends.

    Recommended action: Upgrade to 1.5.1 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.

    Sources:osv.dev (1)github.com (2)Source checked Evidence →