{"id":"DEBIAN-CVE-2026-100700","details":"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.","modified":"2026-09-27T05:00:08.080664492Z","published":"2026-09-26T14:16:55.007Z","upstream":["CVE-2026-100700"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-100700"}],"affected":[{"package":{"name":"node-nodemailer","ecosystem":"Debian:12","purl":"pkg:deb/debian/node-nodemailer?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.0.0+~8.0.1-1","10.0.10+~8.0.1-1","10.0.10+~8.0.2-1","6.10.0+~6.4.17-1","6.8.0+~6.4.6-1","6.9.13+~6.4.14-1","6.9.15+~6.4.16-1","6.9.16+~6.4.16-1","6.9.4+~6.4.9-1","6.9.4+~6.4.9-2","6.9.4+~6.4.9-3","6.9.4+~6.4.9-4","7.0.10+~7.0.2-1","7.0.12+~7.0.5-1","7.0.5+~7.0.1-1","7.0.6+~7.0.1-1","7.0.9+~7.0.2-1","7.0.9+~7.0.2-2","8.0.11+~8.0.1-1","8.0.2+~7.0.11-1","8.0.3+~7.0.11-1","8.0.4+~7.0.11-1","8.0.4+~7.0.11-2","9.0.0+~8.0.1-1","9.0.3+~8.0.1-1","9.0.5+~8.0.1-1","9.0.6+~8.0.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-100700.json"}},{"package":{"name":"node-nodemailer","ecosystem":"Debian:13","purl":"pkg:deb/debian/node-nodemailer?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["10.0.0+~8.0.1-1","10.0.10+~8.0.1-1","10.0.10+~8.0.2-1","6.10.0+~6.4.17-1","6.10.0+~6.4.17-1+deb13u1","7.0.10+~7.0.2-1","7.0.12+~7.0.5-1","7.0.5+~7.0.1-1","7.0.6+~7.0.1-1","7.0.9+~7.0.2-1","7.0.9+~7.0.2-2","8.0.11+~8.0.1-1","8.0.2+~7.0.11-1","8.0.3+~7.0.11-1","8.0.4+~7.0.11-1","8.0.4+~7.0.11-2","9.0.0+~8.0.1-1","9.0.3+~8.0.1-1","9.0.5+~8.0.1-1","9.0.6+~8.0.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-100700.json"}},{"package":{"name":"node-nodemailer","ecosystem":"Debian:14","purl":"pkg:deb/debian/node-nodemailer?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"10.0.10+~8.0.1-1"}]}],"versions":["10.0.0+~8.0.1-1","6.10.0+~6.4.17-1","7.0.10+~7.0.2-1","7.0.12+~7.0.5-1","7.0.5+~7.0.1-1","7.0.6+~7.0.1-1","7.0.9+~7.0.2-1","7.0.9+~7.0.2-2","8.0.11+~8.0.1-1","8.0.2+~7.0.11-1","8.0.3+~7.0.11-1","8.0.4+~7.0.11-1","8.0.4+~7.0.11-2","9.0.0+~8.0.1-1","9.0.3+~8.0.1-1","9.0.5+~8.0.1-1","9.0.6+~8.0.1-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-100700.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}