How severe is CVE-2026-27492?

CVE-2026-27492 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-27492 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27492?

CVE-2026-27492 affects Lettermint. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27492?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-27492 have an EU (EUVD) identifier?

Yes. CVE-2026-27492 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7708.

When was CVE-2026-27492 published?

CVE-2026-27492 was published on 2026-02-21 and last updated on 2026-06-17.

CVE-2026-27492

CVE-2026-27492 is a medium-severity vulnerability in Lettermint with a CVSS 3.x base score of 4.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-488.

Key facts

Severity: Medium (CVSS 3.x base score 4.7)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7708
Weakness: CWE-488
Affected product: Lettermint
Published: 2026-02-21
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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 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.
How severe is CVE-2026-27492?: CVE-2026-27492 has a CVSS 3.x base score of 4.7, rated medium severity. It is exploitable over local access with high attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-27492 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27492?: CVE-2026-27492 affects Lettermint. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27492?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27492 have an EU (EUVD) identifier?: Yes. CVE-2026-27492 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7708.
When was CVE-2026-27492 published?: CVE-2026-27492 was published on 2026-02-21 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:lettermint:lettermint:*:*:*:*:*:node.js:*:*

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