Description

Unhead is a document head and template manager. Prior to 2.1.11, The link.href check in makeTagSafe (safe.ts) uses String.includes(), which is case-sensitive. Browsers treat URI schemes case-insensitively. DATA:text/css,... is the same as data:text/css,... to the browser, but 'DATA:...'.includes('data:') returns false. An attacker can inject arbitrary CSS for UI redressing or data exfiltration via CSS attribute selectors with background-image callbacks. This vulnerability is fixed in 2.1.11.

INFO

Published Date :

2026-03-12T17:20:35.660Z

Last Modified :

2026-03-12T17:46:46.723Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-31873 vulnerability.

Vendors Products
Unjs
  • Unhead
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-31873.

URL Resource
https://github.com/unjs/unhead/security/advisories/GHSA-5339-hvwr-7582 cve-icon cve-icon
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CVSS Vulnerability Scoring System

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