Vulnerability · Published Aug 31, 2026 · Assigned by VulnCheck

CVE-2024-58379nodemailer before 6.9.9 ReDoS via attachDataUrls parameter

Medium 5.3

In plain English

A medium-severity regular-expression denial of service in nodemailer from nodemailer. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 63.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

nodemailer before 6.9.9 contains a regular expression denial of service vulnerability in email parsing when attachDataUrls parameter is set or processing embedded file attachments. Attackers can send specially crafted emails with malicious data URLs or embedded attachments to cause the event loop to hang and deny service.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	node-nodemailer	no fix listed	DEBIAN-CVE-2024-58379
Debian:13	node-nodemailer	6.9.13+~6.4.14-1	DEBIAN-CVE-2024-58379
Debian:14	node-nodemailer	6.9.13+~6.4.14-1	DEBIAN-CVE-2024-58379
Ubuntu:22.04:LTS	node-nodemailer	no fix listed	UBUNTU-CVE-2024-58379
Ubuntu:24.04:LTS	node-nodemailer	no fix listed	UBUNTU-CVE-2024-58379
npm	nodemailer	6.9.9	GHSA-9h6g-pr28-7cqp

Affected products (as reported)

Vendor	Product	Versions
nodemailer	nodemailer	0 – before 6.9.9

Weakness: CWE-1333 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

GitHub Security Advisory (GHSA-9h6g-pr28-7cqp) vendor-advisory
VulnCheck Advisory: nodemailer before 6.9.9 ReDoS via attachDataUrls parameter third-party-advisory