Bug 2541883 (CVE-2026-100700) - CVE-2026-100700 nodemailer: nodemailer: Denial of Service via regular expression backtracking in addressparser
Summary: CVE-2026-100700 nodemailer: nodemailer: Denial of Service via regular express...
Keywords:
Status: NEW
Alias: CVE-2026-100700
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-26 13:39 UTC by OSIDB Bzimport
Modified: 2026-09-26 14:03 UTC (History)
21 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-09-26 13:39:40 UTC 
nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of seconds, causing service unavailability.
Note You need to log in before you can comment on or make changes to this bug.