Vulnerability in Nodemailer
CVE-2026-82853
Nodemailer versions before 8.0.5 contain an SMTP command injection vulnerability in the transport name option used in EHLO/HELO commands. The name parameter is concatenated directly into SMTP commands without sanitizing carriage return and line feed characters, allowing attackers to inject arbitrary SMTP commands for email spoofing and phishing attacks.
Vulnerability class: CRLF Injection
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.010 (63.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 63.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.010 · change: +0.003
Affected products
Weakness classification (CWE)
References
- github.com/nodemailer/nodemailer/security/advisories/GHSA-vvjj-xcjg-gr5g (vendor-advisory)
- www.vulncheck.com/advisories/nodemailer-before-8.0.5-smtp-command-injection-via… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-82853?
- CVE-2026-82853 is a medium-severity vulnerability in Nodemailer, classified under CRLF Injection. CVSS score: 4.9/10. Published 2026-08-31.
- How severe is CVE-2026-82853?
- Medium severity. CVSS v3 base score is 4.9 out of 10.