{"id":"CVE-2026-110872","title":"Nodemailer from 3.0.0 before 10.0.10 contains a quadratic complexity denial of service vulnerability in the SMTP client reply parser in SMTPConnection._onData and isPartialResponse","summary":"Nodemailer from 3.0.0 before 10.0.10 contains a quadratic complexity denial of service vulnerability in the SMTP client reply parser in SMTPConnection._onData and isPartialResponse. A malicious SMTP server or on-path attacker can stream …","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-400"],"published":"2026-10-14","updated":"2026-10-14","sourceUpdated":"2026-10-14T23:17:29.097","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-110872","references":[{"url":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-4g23-2xm8-66gc","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.0.10-denial-of-service-via-smtp-reply-parsing","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"ingestedAt":"2026-10-15T00:02:07.190Z","slug":"CVE-2026-110872","body":"## Overview\n\nNodemailer from 3.0.0 before 10.0.10 contains a quadratic complexity denial of service vulnerability in the SMTP client reply parser in SMTPConnection._onData and isPartialResponse. A malicious SMTP server or on-path attacker can stream continuation lines without a completion line before authentication, blocking the Node.js event loop and exhausting memory.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}