{"id":"CVE-2026-82854","aliases":[],"cve":{"records":[{"id":"CVE-2026-82854","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-08-31T08:37:27.053Z","published":"2026-08-31T08:46:28.405Z","modified":"2026-10-29T21:16:56.214Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-10-29T21:16:56.214Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-08-31T18:52:03.366Z"}],"references":[{"url":"https://github.com/nodemailer/nodemailer/security/advisories/GHSA-c7w3-x93f-qmm8","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/nodemailer-before-8.0.3-smtp-command-injection-via-envelope-size","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-93","description":"Improper Neutralization of CRLF Sequences ('CRLF Injection')","source":"VulnCheck"}],"applicability":[{"source":"VulnCheck","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:nodemailer:nodemailer:*:*:*:*:*:*:*:*","versionEndExcluding":"8.0.4"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-08-31T16:46:43.285974Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"total"}]}]},"title":"Nodemailer before 8.0.4 SMTP Command Injection via envelope.size","titleSource":"VulnCheck","descriptionSource":"VulnCheck","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.","score":9.8,"severity":"critical","published":"2026-08-31T08:46:28.405Z","modified":"2026-10-29T21:16:56.214Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"nodemailer","name":"nodemailer","platforms":[],"versions":[{"version":"0","status":"affected","lessThan":"8.0.4","versionType":"semver"},{"version":"8.0.4","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:npm/nodemailer","packageIdentity":{"ecosystem":"npm","name":"nodemailer"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-82854"}],"remediation":[],"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"],"sources":[{"name":"CVE","id":"CVE-2026-82854","modified":"2026-10-29T21:16:56.214Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-82854"}],"assessments":[{"source":"VulnCheck","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","score":9.3},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8}],"sourceAffected":[],"observedAt":"2026-10-29T21:37:42.224Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T14:05:32.453Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-10-29T21:50:35.830Z","attemptedAt":"2026-10-29T21:50:35.830Z"},{"source":"GHSA","status":"available","checkedAt":"2026-10-29T21:50:36.492Z","attemptedAt":"2026-10-29T21:50:36.492Z"},{"source":"EUVD","status":"available","checkedAt":"2026-10-29T21:50:36.655Z","attemptedAt":"2026-10-29T21:50:36.655Z"},{"source":"EPSS","status":"available","checkedAt":"2026-10-29T21:50:35.916Z","attemptedAt":"2026-10-29T21:50:35.916Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-82854","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82854","modified":"2026-10-29T21:17:33.500","score":9.3,"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","checkedAt":"2026-10-29T21:50:35.830Z"},{"source":"NVD","id":"CVE-2026-82854","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82854","modified":"2026-10-29T21:17:33.500","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-10-29T21:50:35.830Z"},{"source":"FIRST EPSS","id":"CVE-2026-82854","url":"https://www.first.org/epss/","probability":0.01975,"percentile":0.80434,"date":"2026-10-29","checkedAt":"2026-10-29T21:50:35.916Z"},{"source":"GitHub Advisory Database","id":"GHSA-2x76-7hhq-pgvw","url":"https://github.com/advisories/GHSA-2x76-7hhq-pgvw","modified":"2026-08-31T09:30:34Z","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-10-29T21:50:36.492Z"},{"source":"ENISA EUVD","id":"EUVD-2026-68442","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-68442","modified":"Oct 29, 2026, 8:20:15 PM","score":9.3,"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","checkedAt":"2026-10-29T21:50:36.655Z"}],"aiSummary":{"text":"Nodemailer before 8.0.4 is vulnerable to SMTP command injection via the envelope.size parameter, allowing injection of arbitrary SMTP commands if an application exposes the envelope size to attacker-controlled input. The weakness is due to improper neutralization of CRLF sequences. Exploitation requires attacker-controlled input.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:26:08.018Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-82854"}]}}