# CVE-2026-121426: Nodemailer 3.0.0 before 10.1.4 Recipient Domain Confusion via addressparser

Status: published. Published: 2026-11-03. Updated: 2026-11-03.

Nodemailer from 3.0.0 before 10.1.4 contains an address parsing vulnerability in addressparser that ends an angle-addr at a '>' inside a quoted local part, comment or domain literal. Attackers can submit addresses that validate as an allowed domain but are delivered to an attacker-controlled domain, bypassing recipient allow lists and disclosing message content.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- nodemailer / nodemailer (nodemailer): ≥ 3.0.0; < 10.1.4 (affected, semver); 10.1.4 (unaffected, semver). Source: CNA: VulnCheck

## Severity and prioritization

- CVSS 4.0: 8.3 (high); CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N; source: CNA: VulnCheck

- CVSS 3.1: 6.5 (medium); CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N; source: CNA: VulnCheck

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-20

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/nodemailer/nodemailer/security/advisories/GHSA-85x2-q946-cp5h (CNA: VulnCheck; vendor-advisory)

- https://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.1.4-recipient-domain-confusion-via-addressparser (CNA: VulnCheck; third-party-advisory)

## Provenance

- CNA: VulnCheck: https://www.cve.org/CVERecord?id=CVE-2026-121426; retrieved 2026-11-03; source updated 2026-11-03

Revision: 0c8db764e2cb76bcc6df9f05a747ab0323b8d4a17707c703211005aab4c620cc

Canonical: https://y2.dev/cve/CVE-2026-121426

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