{"id":"UBUNTU-CVE-2026-110870","details":"Nodemailer from 3.0.0 before 10.0.13 contains an improper input validation vulnerability in its address parser that fails to strip RFC 5322 comments inside angle-bracket addresses. Attackers can supply recipients like a display name with a parenthesized comment in the domain, so illegal characters reach envelope.to and RCPT TO, causing rejected delivery or parser interpretation conflicts that bypass domain allow-lists.","modified":"2026-10-17T12:58:03.949077748Z","published":"2026-10-15T00:00:00Z","upstream":["CVE-2026-110870"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-110870"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-110870"},{"type":"REPORT","url":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-g73g-hqqh-jr95"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/nodemailer-before-10.0.13-improper-input-validation-via-angle-bracket-address-comments"}],"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-2026-110870.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-2026-110870.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-2026-110870.json"}},{"package":{"name":"node-nodemailer","ecosystem":"Ubuntu:26.10","purl":"pkg:deb/ubuntu/node-nodemailer?arch=source&distro=stonking"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["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"],"ecosystem_specific":{"binaries":[{"binary_name":"node-nodemailer","binary_version":"9.0.5+~8.0.1-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-110870.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-2026-110870.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:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}