Is CVE-2026-92596 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-92596?

CVE-2026-92596 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-92596

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.