CVE-2026-92596

HIGH 7.5

Nodemailer before 9.1.0 Denial of Service via addressparser

CVSS Score

7.5

EPSS Score

0.0%

EPSS Percentile

0th

Nodemailer before 9.1.0 contains a quadratic time complexity vulnerability in the addressparser component that allows remote attackers to cause denial of service by supplying a crafted comma-separated address list. Attackers can send a single email with a large number of addresses to block the Node.js event loop for extended periods, consuming 100% CPU and freezing the process.

CWE	CWE-400
Vendor	nodemailer
Product	nodemailer
Published	Sep 16, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

nodemailer / nodemailer

0 < 9.1.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/nodemailer/nodemailer/security/advisories/GHSA-2x7j-588g-ccc2 github.com: https://github.com/nodemailer/nodemailer/commit/9116da9 github.com: https://github.com/nodemailer/nodemailer/commit/7cc38af github.com: https://github.com/nodemailer/nodemailer/commit/34da642 github.com: https://github.com/nodemailer/nodemailer/commit/83b8c48 vulncheck.com: https://www.vulncheck.com/advisories/nodemailer-before-9.1.0-denial-of-service-via-addressparser

Credits

🔍 e1abrador