node-nodemailer: Nodemailer from 3.0.0 before 10.0.10 contains a denial of service vulnerability in MessageParser.parseHeaders that al...
CVE-2026-110871 is fixed in node-nodemailer on 1 platform by DEBIAN-CVE-2026-110871 (version 10.0.10+~8.0.1-1), released October 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Nodemailer from 3.0.0 before 10.0.10 contains a denial of service vulnerability in MessageParser.parseHeaders that allows users to exhaust CPU through quadratic header unfolding. Attackers can supply large recipient lists or long headers that fold into tens of thousands of continuation lines, blocking the Node.js event loop during DKIM signing.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| node-nodemailer · Debian 14 | 10.0.10+~8.0.1-1 | DEBIAN-CVE-2026-110871 | Oct 16, 2026 |
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