CVE-2026-82661CWE-93

CVE-2026-82661

Medium · published August 31, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
16.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
CVSS v4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
EPSS
0.00261 · 16.9th percentile
Weakness
CWE-93 · Improper Neutralization of CRLF Sequences ('CRLF Injection')
Published
2026-08-31T13:17Z
References (3)
https://github.com/nodemailer/nodemailer/security/advisories/GHSA-268h-hp4c-crq3 · [email protected]https://www.vulncheck.com/advisories/nodemailer-crlf-injection-via-list-header-comments · [email protected]https://github.com/nodemailer/nodemailer/security/advisories/GHSA-268h-hp4c-crq3 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 01 SEP 03:32Z
    EPSS moved — → 0%
    epss
  • 31 AUG 08:46Z
    Nodemailer CRLF Injection via List-* Header Comments
    cvelistv5