{"id":"CVE-2026-82854","revision":"7e3b51010fc444c281bb3684e567563f","records":[{"revision":"7e3b51010fc444c281bb3684e567563f","observedAt":"2026-10-31T19:05:03.128+00:00","statement":{"source":"nvd","id":"CVE-2026-82854","aliases":[],"title":"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…","description":"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.","state":0,"publishedAt":"2026-08-31T09:17:05.463+00:00","modifiedAt":"2026-10-29T21:17:33.5+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · disclosure@vulncheck.com · Secondary","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":9.3,"severity":"CRITICAL"},{"system":"CVSS 3.1 · disclosure@vulncheck.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://github.com/nodemailer/nodemailer/security/advisories/GHSA-c7w3-x93f-qmm8","https://www.vulncheck.com/advisories/nodemailer-before-8.0.3-smtp-command-injection-via-envelope-size"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-82854","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-93"],"productCriteria":[],"sourceDates":{"published":"2026-08-31T09:17:05.463","lastModified":"2026-10-29T21:17:33.500"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-82854","identifiers":["CVE-2026-82854"]},"retained":false,"historicalAffected":[]}],"coverage":[]}