{"id":"EUVD-2026-101754","enisaUuid":"76c974c5-9ff9-35a3-8a4d-d24de29f9366","description":"Nodemailer from 3.0.0 before 10.0.10 contains a denial of service vulnerability in MessageParser.parseHeaders that allows users to exhaust CPU through quadratic header unfolding. Attackers can supply large recipient lists or long headers that fold into tens of thousands of continuation lines, blocking the Node.js event loop during DKIM signing.","datePublished":"Oct 14, 2026, 10:52:59 PM","dateUpdated":"Oct 20, 2026, 2:28:10 AM","baseScore":7.1,"baseScoreVersion":"4.0","baseScoreVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","references":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-39m8-27wv-hr27\nhttps://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.0.10-quadratic-dkim-header-unfolding-denial-of-service\n","aliases":"CVE-2026-110871\nGHSA-wxxx-r42m-9rp8\nGHSA-39m8-27wv-hr27\n","assigner":"VulnCheck","epss":0.38,"enisaIdProduct":[{"id":"041b83b1-ae72-3976-baec-cfe2b30a8295","product":{"name":"nodemailer","vendor":{"name":"nodemailer"}},"product_version":"3.0.0 \u003c10.0.10"}],"enisaIdVendor":[{"id":"469dd2b6-831f-3474-af61-e17ac2d69abc","vendor":{"name":"nodemailer"}}],"enisaIdVulnerability":[{"id":"0ce85a80-6a84-32a5-8da6-ecaf2c8556fa","vulnerability":{"id":"GHSA-39m8-27wv-hr27","description":"Nodemailer: Quadratic (O(n^2)) DKIM header unfolding lets a large folded header cause remote denial of service during signing","datePublished":"Oct 22, 2026, 4:07:04 PM","dateUpdated":"Oct 22, 2026, 4:07:05 PM","baseScore":0.0,"references":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-39m8-27wv-hr27\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-110871\nhttps://github.com/nodemailer/nodemailer/commit/28a5909cec27646cb001dc7e97a8f5d26c973078\nhttps://github.com/nodemailer/nodemailer\nhttps://github.com/nodemailer/nodemailer/releases/tag/v10.0.10\nhttps://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.0.10-quadratic-dkim-header-unfolding-denial-of-service\n","enisa_id":"EUVD-2026-101754\n","aliases":"CVE-2026-110871\nGHSA-39m8-27wv-hr27\n","epss":0.0,"dataProcessed":"Nov 1, 2026, 2:09:03 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}},{"id":"4c621567-7e3d-3a61-bcd3-2b4668fa55ad","vulnerability":{"id":"GHSA-wxxx-r42m-9rp8","description":"Duplicate Advisory: Nodemailer: Quadratic (O(n^2)) DKIM header unfolding lets a large folded header cause remote denial of service during signing","datePublished":"Oct 15, 2026, 12:31:19 AM","dateUpdated":"Oct 22, 2026, 4:06:03 PM","baseScore":0.0,"references":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-39m8-27wv-hr27\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-110871\nhttps://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.0.10-quadratic-dkim-header-unfolding-denial-of-service\n","enisa_id":"EUVD-2026-101754\n","aliases":"GHSA-wxxx-r42m-9rp8\n","epss":0.0,"dataProcessed":"Nov 1, 2026, 2:07:48 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}},{"id":"9b152d59-c7f3-3874-ab62-e22660fe9638","vulnerability":{"id":"CVE-2026-110871","description":"Nodemailer from 3.0.0 before 10.0.10 contains a denial of service vulnerability in MessageParser.parseHeaders that allows users to exhaust CPU through quadratic header unfolding. Attackers can supply large recipient lists or long headers that fold into tens of thousands of continuation lines, blocking the Node.js event loop during DKIM signing.","datePublished":"Oct 14, 2026, 10:52:59 PM","dateUpdated":"Oct 20, 2026, 2:28:10 AM","status":"PUBLISHED","baseScore":7.1,"baseScoreVersion":"4.0","baseScoreVector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","references":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-39m8-27wv-hr27\nhttps://www.vulncheck.com/advisories/nodemailer-3.0.0-before-10.0.10-quadratic-dkim-header-unfolding-denial-of-service\n","enisa_id":"EUVD-2026-101754\n","assigner":"VulnCheck","epss":0.38,"dataProcessed":"Nov 1, 2026, 4:01:42 AM","vulnerabilityProduct":[{"id":"d9663aa7-e801-3bd1-ab80-7bd5842aefd3","product":{"name":"nodemailer","vendor":{"name":"nodemailer"}},"product_version":"3.0.0 \u003c10.0.10"}],"vulnerabilityVendor":[{"id":"f049431f-3bc0-36b7-8635-e679e6f90feb","vendor":{"name":"nodemailer"}}]}}],"enisaIdAdvisory":[]}