# CVE-2026-92598: node-nodemailer: Nodemailer before 9.1.0 fails to apply UTS-46 normalization when encoding international domain names, causing the dom...

CVE-2026-92598 is fixed in node-nodemailer on 1 platform by DEBIAN-CVE-2026-92598 (version 10.0.0+~8.0.1-1), released September 18, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-92598
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0040
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-nodemailer Debian 14 | 10.0.0+~8.0.1-1 | [DEBIAN-CVE-2026-92598](https://patchblox.com/security/data/fix/linux/debian-cve-2026-92598.md) | Sep 18, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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