{"id":"UBUNTU-CVE-2026-82854","details":"Nodemailer before 8.0.4 is vulnerable to SMTP command injection through the unsanitized envelope.size parameter. When an application passes a custom envelope object with a size property containing CRLF characters to sendMail(), the value is concatenated into the SMTP MAIL FROM command (as SIZE=...) without sanitization, allowing injection of arbitrary SMTP commands such as RCPT TO to silently add attacker-controlled recipients. Exploitation requires the application to expose the envelope size to attacker-controlled input, as Nodemailer does not include size in the default auto-constructed envelope.","modified":"2026-09-02T16:28:28Z","published":"2026-08-31T09:17:00Z","upstream":["CVE-2026-82854"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-82854"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-82854"},{"type":"REPORT","url":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-c7w3-x93f-qmm8"},{"type":"REPORT","url":"https://www.vulncheck.com/advisories/nodemailer-before-8.0.3-smtp-command-injection-via-envelope-size"}],"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-2026-82854.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-2026-82854.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-2026-82854.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:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}