Vulnerability record · CVE-2026-92596 · published 16 September 2026

CVE-2026-92596: Uncontrolled resource consumption vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.82% · top 44.3% CWE-400 · Uncontrolled resource consumption Awaiting Analysis

8.7CVSS 4.0 base score

0.82%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

7References

22 Sep 2026Last modified by NVD

Description

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-92596), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.