medium6.1
CVE-2026-3455
mailparser vulnerable to Cross-site Scripting
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | mailparser | < 3.9.3 | 3.9.3 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Nodemailer | Mailparser | before 3.9.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://gist.github.com/hayageek/7fcb225e3b1ea9a341d560403fbb585a
- https://github.com/nodemailer/mailparser/commit/921a67df4cfb38f0b411037d7b26fbd4d5411b08
- https://github.com/nodemailer/mailparser/issues/412
- https://security.snyk.io/vuln/SNYK-JS-MAILPARSER-15204032
- https://github.com/advisories/GHSA-7gmj-h9xc-mcxc
- https://nvd.nist.gov/vuln/detail/CVE-2026-3455