# CVE-2026-110872: node-nodemailer: Nodemailer from 3.0.0 before 10.0.10 contains a quadratic complexity denial of service vulnerability in the SMTP clie...

CVE-2026-110872 is fixed in node-nodemailer on 1 platform by DEBIAN-CVE-2026-110872 (version 10.0.10+~8.0.1-1), released October 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-110872
- Priority: Routine
- CVSS: n/a
- EPSS: 0.0036
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 14, 2026

## Description

Nodemailer from 3.0.0 before 10.0.10 contains a quadratic complexity denial of service vulnerability in the SMTP client reply parser in SMTPConnection._onData and isPartialResponse. A malicious SMTP server or on-path attacker can stream continuation lines without a completion line before authentication, blocking the Node.js event loop and exhausting memory.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | node-nodemailer Debian 14 | 10.0.10+~8.0.1-1 | [DEBIAN-CVE-2026-110872](https://patchblox.com/security/data/fix/linux/debian-cve-2026-110872.md) | Oct 16, 2026 |

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Data as of 2026-11-10T20:03:11Z 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 Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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