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Vulnerability record · CVE-2021-23400 · published 29 June 2021

CVE-2021-23400: Nodemailer injection vulnerability

Nodemailer · Nodemailer

The package nodemailer before 6.6.1 are vulnerable to HTTP Header Injection if unsanitized user input that may contain newlines and carriage returns is passed into an address object.

8.8 CVSS 3.1 High EPSS 1.4% · top 28.7% CWE-74 · Injection
8.8CVSS 3.1 base score, v2 6.8
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 4 tagged exploit
17 Jun 2026Last modified by NVD

Description

The package nodemailer before 6.6.1 are vulnerable to HTTP Header Injection if unsanitized user input that may contain newlines and carriage returns is passed into an address object.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/nodemailer/nodemailer/commit/7e02648cc8cd863f5085bad3cd09087bccf84b9f PatchThird Party Advisory
https://github.com/nodemailer/nodemailer/issues/1289 Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1314737 ExploitPatchThird Party Advisory
https://snyk.io/vuln/SNYK-JS-NODEMAILER-1296415 ExploitPatchThird Party Advisory
https://github.com/nodemailer/nodemailer/commit/7e02648cc8cd863f5085bad3cd09087bccf84b9f PatchThird Party Advisory
https://github.com/nodemailer/nodemailer/issues/1289 Third Party Advisory
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1314737 ExploitPatchThird Party Advisory
https://snyk.io/vuln/SNYK-JS-NODEMAILER-1296415 ExploitPatchThird Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-23400), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.