CVE-2026-82661

MEDIUM 5.4

Nodemailer CRLF Injection via List-* Header Comments

CVSS Score

5.4

EPSS Score

0.0%

EPSS Percentile

0th

Nodemailer before 8.0.9 fails to sanitize carriage return and line feed characters in list comment fields, allowing attackers to inject arbitrary message headers. An attacker with control over list.*.comment parameters can inject CRLF sequences to create additional headers in generated RFC822 messages, altering mail client behavior and message semantics.

CWE	CWE-93
Vendor	nodemailer
Product	nodemailer
Published	Aug 31, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

nodemailer / nodemailer

0 < 8.0.9

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/nodemailer/nodemailer/security/advisories/GHSA-268h-hp4c-crq3 vulncheck.com: https://www.vulncheck.com/advisories/nodemailer-crlf-injection-via-list-header-comments

Credits

🔍 sondt99 🔍 dungNHVhust