{"id":"UBUNTU-CVE-2026-90776","details":"Nodemailer versions 9.1.0 through 10.0.4 contain a quadratic time complexity vulnerability in the addressparser component when parsing email addresses with RFC 5322 comments. Attackers can craft malicious email headers with comment-separated atoms to consume excessive CPU and block the Node.js event loop for several seconds, causing denial of service.","modified":"2026-09-16T14:03:34.664529175Z","published":"2026-09-13T12:17:00Z","upstream":["CVE-2026-90776"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-90776"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-90776"},{"type":"REPORT","url":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-prgh-xp8r-p3m5"}],"affected":[{"package":{"name":"node-nodemailer","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/node-nodemailer?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.3.0-2","6.3.1-1","6.4.0-1","6.4.1-1","6.4.2-1","6.4.5-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-nodemailer","binary_version":"6.4.5-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90776.json"}},{"package":{"name":"node-nodemailer","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/node-nodemailer?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.4.17-3","6.7.0-1","6.7.0-2","6.7.1+~6.4.4-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-nodemailer","binary_version":"6.7.1+~6.4.4-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90776.json"}},{"package":{"name":"node-nodemailer","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/node-nodemailer?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["6.9.4+~6.4.9-2","6.9.4+~6.4.9-3ubuntu1","6.9.4+~6.4.9-4"],"ecosystem_specific":{"binaries":[{"binary_name":"node-nodemailer","binary_version":"6.9.4+~6.4.9-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90776.json"}},{"package":{"name":"node-nodemailer","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/node-nodemailer?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["7.0.5+~7.0.1-1","7.0.9+~7.0.2-2","7.0.10+~7.0.2-1","7.0.12+~7.0.5-1","8.0.4+~7.0.11-1"],"ecosystem_specific":{"binaries":[{"binary_name":"node-nodemailer","binary_version":"8.0.4+~7.0.11-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-90776.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"},{"type":"CVSS_V4","score":"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"},{"type":"Ubuntu","score":"medium"}]}