XML Injection Affecting @astrojs/rss package, versions >=1.0.0 <4.0.19
Threat Intelligence
Exploit Maturity
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
Proof of Concept
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Test your applications- Snyk IDSNYK-JS-ASTROJSRSS-18085631
- published21 Jul 2026
- disclosed20 Jul 2026
- creditalanturing881
Introduced: 20 Jul 2026
NewCVE-2026-59728 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade @astrojs/rss to version 4.0.19 or higher.
Overview
@astrojs/rss is an Add RSS feeds to your Astro projects
Affected versions of this package are vulnerable to XML Injection via the source.title and enclosure.type fields, which are interpolated directly into XML templates without proper escaping. An attacker can inject arbitrary XML elements into the generated RSS feed by supplying specially crafted values for these fields, potentially corrupting the feed structure or injecting malicious links.