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CVE-2026-92596

7.5 · HIGH

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-separa…

Published Sep 16, 2026CWE-400EPSS 0.82%

Overview

CVE-2026-92596 is a high-severity vulnerability. It was published on September 16, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/nodemailer/nodemailer/commit/34da642GitHubgithub.com/nodemailer/nodemailer/commit/7cc38afGitHubgithub.com/nodemailer/nodemailer/commit/83b8c48GitHubgithub.com/nodemailer/nodemailer/commit/9116da9GitHubgithub.com/nodemailer/nodemailer/security/advisories/GHSA-2x7j-588g-ccc2Refwww.vulncheck.com/advisories/nodemailer-before-9.1.0-denial-of-service-via-addressparserGitHubgithub.com/nodemailer/nodemailer/security/advisories/GHSA-2x7j-588g-ccc2

How CyberStrike helps

Frequently asked questions

What is CVE-2026-92596?

CVE-2026-92596 is a high-severity vulnerability. It was published on September 16, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-92596?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-92596?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-92596?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-92596 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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