XML Injection Affecting @astrojs/rss package, versions >=1.0.0 <4.0.19
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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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)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.