CVE-2026-54298

Description

Astro is a web framework. Prior to 6.4.6, the spreadAttributes function in Astro's server-side rendering pipeline iterates over object keys and passes them directly to addAttribute, which interpolates the key into the HTML output without escaping. When a developer uses the spread syntax {...props} on an HTML element and the object keys come from an untrusted source (API, CMS, URL parameters), an attacker can inject arbitrary HTML attributes including event handlers like onmousemove, onclick, or break out of the attribute context entirely to inject new elements. This vulnerability is fixed in 6.4.6.

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Produits concernés

• withastro astro
• Astro astro

Scores CVSS

Faiblesses (CWE)

• CWE-79

Références

• https://github.com/withastro/astro/security/advisories/GHSA-jrpj-wcv7-9fh9 ExploitVendor Advisory
• https://github.com/withastro/astro/security/advisories/GHSA-jrpj-wcv7-9fh9 ExploitVendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories