CVE-2026-3455

MEDIUM

mailparser < 3.9.3 - Cross-Site Scripting via textToHtml URL Sanitization Bypass

Title source: llm
STIX 2.1

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.

References (4)

Core 4

Scores

CVSS v3 6.1
EPSS 0.0006
EPSS Percentile 17.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79
Status published
Products (2)
nodemailer/mailparser < 3.9.3
npm/mailparser 0 - 3.9.3npm
Published Mar 03, 2026
Tracked Since Mar 03, 2026