Linkify Allows Prototype Pollution & HTML Attribute Injection (XSS)
Prototype Pollution in internal assign() helper in Linkify allows remote attackers to execute arbitrary JavaScript (Stored or Reflected XSS) via injection of event handlers through unfiltered proto property. This issue affects Linkify version 4.3.1 and is fixed in 4.3.2.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | linkifyjs | >= 4.3.1, < 4.3.2 | 4.3.2 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2025-8101
- https://github.com/nfrasser/linkifyjs/commit/931d3e28b68951b8f898ea4d6504696346b485b0
- https://caverav.cl/posts/linkify-xss/linkify-xss
- https://fluidattacks.com/advisories/charly
- https://github.com/nfrasser/linkifyjs
- https://github.com/nfrasser/linkifyjs/releases/tag/v4.3.2
- https://www.npmjs.com/package/linkifyjs
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-1321- Platform
- npm
- Package
linkifyjs- Disclosed
- 26.07.2025
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-95jq-xph2-cx9h - CC BY 4.0
Vulnerability history: linkifyjs
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
This is the only known vulnerability of this package.
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