CVE-2026-3455
Medium
Description
Versions of the package mailparser before 3.9.3 are vulnerable to Cross-site Scripting (XSS) via the textToHtml() function due to the improper sanitisation of URLs in the email content. An attacker can execute arbitrary scripts in victim browsers by adding extra quote " to the URL with embedded malicious JavaScript code.
SeverityMedium
CVSS6.1
Exploit probability—
ProductNodemailer Mailparser
PublishedMar 3, 2026
First seenMar 3, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- nodemailer mailparser3.9.3 or later
- mailparser3.9.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nodemailer mailparser | v < 3.9.3 | 3.9.3 |
| mailparsernpm | v < 3.9.3 | 3.9.3 |
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