This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-110871 →
DEBIAN-CVE-2026-110871
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...
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
node-nodemailer
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
node-nodemailer
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
node-nodemailer
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.0.10+~8.0.1-1"}]}]
References
- advisory security-tracker.debian.org