CVE-2026-92596Nodemailer before 9.1.0 Denial of Service via addressparser

Description

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.

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

References and patches

• GitHub Security Advisory (GHSA-2x7j-588g-ccc2) vendor-advisory
• Patch Commit patch
• Patch Commit patch
• Patch Commit patch
• Patch Commit patch
• VulnCheck Advisory: Nodemailer before 9.1.0 Denial of Service via addressparser third-party-advisory