Server-side Request Forgery (SSRF) Affecting astro package, versions <5.17.3
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- published26 Feb 2026
- disclosed26 Feb 2026
- creditpHo9UBenaA
Introduced: 26 Feb 2026
NewCVE-2026-27829 (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 astro to version 5.17.3 or higher.
Overview
astro is an Astro is a modern site builder with web best practices, performance, and DX front-of-mind.
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) via the inferSize option that fetches remote images at render time to determine their dimensions. An attacker can cause the server to make unauthorized requests to arbitrary remote hosts by supplying crafted image URLs.