CVE-2026-92598

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/nodemailer/nodemailer/commit/259c32d
https://github.com/nodemailer/nodemailer/commit/b212ac4
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp
https://www.vulncheck.com/advisories/nodemailer-before-9.1.0-idn-punycode-domain-allow-list-bypass
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp

Configurations

No configuration.

History

17 Sep 2026, 15:16

Type	Values Removed	Values Added
References	~~() https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp -~~	() https://github.com/nodemailer/nodemailer/security/advisories/GHSA-wmmp-3585-3rmp -

16 Sep 2026, 22:18

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-16 22:18

Updated : 2026-09-17 15:16

NVD link : CVE-2026-92598

Mitre link : CVE-2026-92598

CVE.ORG link : CVE-2026-92598

JSON object : View

Products Affected

No product.

CWE

CWE-436

Interpretation Conflict

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