# CVE-2026-92596: node-nodemailer: Nodemailer before 9.1.0 contains a quadratic time complexity vulnerability in the addressparser component that allows...

CVE-2026-92596 is fixed in node-nodemailer on 1 platform by DEBIAN-CVE-2026-92596 (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-2026-92596
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0082
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 16, 2026

## Description

Nodemailer before 9.1.0 contains a quadratic time complexity vulnerability in the addressparser component that allows remote attackers to cause denial of service by supplying a crafted comma-separated address list. Attackers can send a single email with a large number of addresses to block the Node.js event loop for extended periods, consuming 100% CPU and freezing the process.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-nodemailer Debian 14 | 10.0.0+~8.0.1-1 | [DEBIAN-CVE-2026-92596](https://patchblox.com/security/data/fix/linux/debian-cve-2026-92596.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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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