CVE-2026-92598

MediumCVSS 6.5/10Last modified Sep 22, 2026

Description

Nodemailer before 9.1.0 fails to apply UTS-46 normalization when encoding international domain names, causing the domain resolver to compute a different Punycode A-label than standards-compliant parsers. Attackers can craft recipient addresses with invisible characters or compatibility mappings that pass domain allow-list checks but are delivered to attacker-controlled domains via SMTP.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N

Weakness enumeration

CWE-436

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

Vendor	Product	Versions
nodemailer	nodemailer	< 9.1.0

References

Timeline

Published: Sep 16, 2026
Last modified: Sep 22, 2026
NVD status: Awaiting Analysis

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