{"id":"CVE-2026-100700","revision":"eb9cc948b9264f6b85d020e5f00e2d68","records":[{"revision":"eb9cc948b9264f6b85d020e5f00e2d68","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-100700","aliases":[],"title":"nodemailer before 10.0.6 Denial of Service via addressparser","description":"nodemailer before 10.0.6 contains a denial of service vulnerability in the addressparser free-text fallback regex pattern that exhibits quadratic backtracking behavior. Attackers can supply crafted email header values with long whitespace-free runs to block the Node.js event loop for tens of seconds, causing service unavailability.","state":0,"publishedAt":"2026-09-26T13:23:56.526+00:00","modifiedAt":"2026-09-28T15:01:54.036+00:00","affected":[{"ecosystem":"Vendor product","name":"nodemailer","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"nodemailer\",\n                    \"product\": \"nodemailer\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"packageURL\": \"pkg:npm/nodemailer\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"10.0.6\"\n                        },\n                        {\n                            \"version\": \"10.0.6\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/nodemailer/nodemailer/security/advisories/GHSA-v53p-9fqp-m79j","https://www.vulncheck.com/advisories/nodemailer-before-10.0.6-denial-of-service-via-addressparser"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-100700","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-100700","identifiers":["CVE-2026-100700"]},"retained":false,"historicalAffected":[]}],"coverage":[]}