Medium severity · published Aug 31, 2026
CVE-2026-82853
Nodemailer before 8.0.5 SMTP Command Injection via CRLF
4.9
CVSS
1%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 64% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NO
nodemailer · nodemailer
before 8.0.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-82853
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-82853
github.com
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-vvjj-xcjg-gr5g
www.vulncheck.com
https://www.vulncheck.com/advisories/nodemailer-before-8.0.5-smtp-command-injection-via-crlf
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