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node-nodemailer — security advisory

Type: advisorySources: OSVAdvisory ID: DEBIAN-CVE-2026-82854

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.

Products
node-nodemailer
Affected versions
10.0.0+~8.0.1-1, 10.0.10+~8.0.1-1, 10.0.10+~8.0.2-1, 10.0.13+~8.0.2-1, 10.0.14+~8.0.2-1, 6.10.0+~6.4.17-1, 6.10.0+~6.4.17-1+deb13u1, 6.8.0+~6.4.6-1, 6.9.13+~6.4.14-1, 6.9.15+~6.4.16-1, 6.9.16+~6.4.16-1, 6.9.4+~6.4.9-1, 6.9.4+~6.4.9-2, 6.9.4+~6.4.9-3, 6.9.4+~6.4.9-4, 7.0.10+~7.0.2-1, 7.0.12+~7.0.5-1, 7.0.5+~7.0.1-1, 7.0.6+~7.0.1-1, 7.0.9+~7.0.2-1, 7.0.9+~7.0.2-2, 8.0.11+~8.0.1-1, 8.0.2+~7.0.11-1, 8.0.3+~7.0.11-1, 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, 9.0.6+~8.0.1-1
Fixed versions
8.0.4+~7.0.11-1
CVEs
CVE-2026-82854
Confirmed fixed CVEs
Not specified
Updated in this feed
28 Oct 2026, 11:09 UTC · Revision 1

Source evidence

DEBIAN-CVE-2026-82854

core-osv · Original source

Published 31 Aug 2026, 09:17 UTC

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.

osv:DEBIAN-CVE-2026-82854

node-nodemailer

Fixed versions: Not specified

node-nodemailer

Fixed versions: Not specified

node-nodemailer

Fixed versions: 8.0.4+~7.0.11-1

Complete source record
{
  "id": "a789b053a7e1ac419a05e5ad94a0f591f4eb9e6542e39862bd3826e433a36ec4",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-82854",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-82854",
    "summary": "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.",
    "evidence": "osv:DEBIAN-CVE-2026-82854",
    "products": [
      {
        "name": {
          "value": "node-nodemailer",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "10.0.0+~8.0.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "10.0.10+~8.0.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "10.0.10+~8.0.2-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "10.0.13+~8.0.2-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "10.0.14+~8.0.2-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "6.10.0+~6.4.17-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "6.8.0+~6.4.6-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "6.9.13+~6.4.14-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "6.9.15+~6.4.16-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "6.9.16+~6.4.16-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "6.9.4+~6.4.9-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "6.9.4+~6.4.9-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "6.9.4+~6.4.9-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "6.9.4+~6.4.9-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "7.0.10+~7.0.2-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "7.0.12+~7.0.5-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "7.0.5+~7.0.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "7.0.6+~7.0.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "7.0.9+~7.0.2-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "7.0.9+~7.0.2-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "8.0.11+~8.0.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "8.0.2+~7.0.11-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "8.0.3+~7.0.11-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "8.0.4+~7.0.11-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "8.0.4+~7.0.11-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "9.0.0+~8.0.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "9.0.3+~8.0.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "9.0.5+~8.0.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "9.0.6+~8.0.1-1",
            "evidence": "/affected/0/versions"
          }
        ]
      },
      {
        "name": {
          "value": "node-nodemailer",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "10.0.0+~8.0.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "10.0.10+~8.0.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "10.0.10+~8.0.2-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "10.0.13+~8.0.2-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "10.0.14+~8.0.2-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "6.10.0+~6.4.17-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "6.10.0+~6.4.17-1+deb13u1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "7.0.10+~7.0.2-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "7.0.12+~7.0.5-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "7.0.5+~7.0.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "7.0.6+~7.0.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "7.0.9+~7.0.2-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "7.0.9+~7.0.2-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "8.0.11+~8.0.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "8.0.2+~7.0.11-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "8.0.3+~7.0.11-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "8.0.4+~7.0.11-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "8.0.4+~7.0.11-2",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "9.0.0+~8.0.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "9.0.3+~8.0.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "9.0.5+~8.0.1-1",
            "evidence": "/affected/1/versions"
          },
          {
            "value": "9.0.6+~8.0.1-1",
            "evidence": "/affected/1/versions"
          }
        ]
      },
      {
        "name": {
          "value": "node-nodemailer",
          "evidence": "/affected/2/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "8.0.4+~7.0.11-1",
            "evidence": "/affected/2/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "6.10.0+~6.4.17-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "7.0.10+~7.0.2-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "7.0.12+~7.0.5-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "7.0.5+~7.0.1-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "7.0.6+~7.0.1-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "7.0.9+~7.0.2-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "7.0.9+~7.0.2-2",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "8.0.2+~7.0.11-1",
            "evidence": "/affected/2/versions"
          },
          {
            "value": "8.0.3+~7.0.11-1",
            "evidence": "/affected/2/versions"
          }
        ]
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "DEBIAN-CVE-2026-82854",
      "aliases": [
        "DEBIAN-CVE-2026-82854"
      ],
      "metrics": [
        {
          "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/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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "node-nodemailer",
            "purl": "pkg:deb/debian/node-nodemailer?arch=source&distro=bookworm",
            "ecosystem": "Debian:12"
          },
          "versions": [
            "10.0.0+~8.0.1-1",
            "10.0.10+~8.0.1-1",
            "10.0.10+~8.0.2-1",
            "10.0.13+~8.0.2-1",
            "10.0.14+~8.0.2-1",
            "6.10.0+~6.4.17-1",
            "6.8.0+~6.4.6-1",
            "6.9.13+~6.4.14-1",
            "6.9.15+~6.4.16-1",
            "6.9.16+~6.4.16-1",
            "6.9.4+~6.4.9-1",
            "6.9.4+~6.4.9-2",
            "6.9.4+~6.4.9-3",
            "6.9.4+~6.4.9-4",
            "7.0.10+~7.0.2-1",
            "7.0.12+~7.0.5-1",
            "7.0.5+~7.0.1-1",
            "7.0.6+~7.0.1-1",
            "7.0.9+~7.0.2-1",
            "7.0.9+~7.0.2-2",
            "8.0.11+~8.0.1-1",
            "8.0.2+~7.0.11-1",
            "8.0.3+~7.0.11-1",
            "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",
            "9.0.6+~8.0.1-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82854.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                }
              ]
            }
          ],
          "package": {
            "name": "node-nodemailer",
            "purl": "pkg:deb/debian/node-nodemailer?arch=source&distro=trixie",
            "ecosystem": "Debian:13"
          },
          "versions": [
            "10.0.0+~8.0.1-1",
            "10.0.10+~8.0.1-1",
            "10.0.10+~8.0.2-1",
            "10.0.13+~8.0.2-1",
            "10.0.14+~8.0.2-1",
            "6.10.0+~6.4.17-1",
            "6.10.0+~6.4.17-1+deb13u1",
            "7.0.10+~7.0.2-1",
            "7.0.12+~7.0.5-1",
            "7.0.5+~7.0.1-1",
            "7.0.6+~7.0.1-1",
            "7.0.9+~7.0.2-1",
            "7.0.9+~7.0.2-2",
            "8.0.11+~8.0.1-1",
            "8.0.2+~7.0.11-1",
            "8.0.3+~7.0.11-1",
            "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",
            "9.0.6+~8.0.1-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82854.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "8.0.4+~7.0.11-1"
                }
              ]
            }
          ],
          "package": {
            "name": "node-nodemailer",
            "purl": "pkg:deb/debian/node-nodemailer?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "6.10.0+~6.4.17-1",
            "7.0.10+~7.0.2-1",
            "7.0.12+~7.0.5-1",
            "7.0.5+~7.0.1-1",
            "7.0.6+~7.0.1-1",
            "7.0.9+~7.0.2-1",
            "7.0.9+~7.0.2-2",
            "8.0.2+~7.0.11-1",
            "8.0.3+~7.0.11-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-82854.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-09T10:00:14.361727318Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-82854"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-82854"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-82854",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 111726,
  "published_at": "2026-08-31T09:17:05.463+00:00"
}