Bug 2552965 (CVE-2026-110871) - CVE-2026-110871 nodemailer: nodemailer: Denial of Service via inefficient header parsing
Summary: CVE-2026-110871 nodemailer: nodemailer: Denial of Service via inefficient hea...
Keywords:
Status: NEW
Alias: CVE-2026-110871
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-14 23:01 UTC by OSIDB Bzimport
Modified: 2026-10-14 23:08 UTC (History)
21 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-10-14 23:01:53 UTC 
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.
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