{"id":"UBUNTU-CVE-2026-100702","details":"Nodemailer before 10.0.2 fails to properly flatten deeply nested arrays in recipient fields such as to, cc, and bcc, allowing attackers to cause stack exhaustion. Attackers can supply a deeply nested JSON recipient array that triggers recursive Array.toString() conversion, exhausting the call stack and terminating the Node.js process.","modified":"2026-09-30T21:41:52Z","published":"2026-09-26T14:16:00Z","upstream":["CVE-2026-100702"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-100702"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-100702"},{"type":"REPORT","url":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-8vvx-rff5-p5rq"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/nodemailer-before-10.0.2-stack-exhaustion-via-nested-recipient-arrays"}],"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_version":"6.4.5-1","binary_name":"node-nodemailer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100702.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_version":"6.7.1+~6.4.4-1","binary_name":"node-nodemailer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100702.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_version":"6.9.4+~6.4.9-4","binary_name":"node-nodemailer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100702.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_version":"8.0.4+~7.0.11-1","binary_name":"node-nodemailer"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-100702.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}