Astro has an Authentication Bypass via Double URL Encoding, a bypass for CVE-2025-64765

Authentication Bypass via Double URL Encoding in Astro Bypass for CVE-2025-64765 / GHSA-ggxq-hp9w-j794 --- Summary A double URL encoding bypass allows any unauthenticated attacker to bypass path-based authentication checks in Astro middleware, granting unauthorized access to protected routes. Whi...

Use of Non-Canonical URL Paths for Authorization Decisions

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 Use of Non-Canonical URL Paths for Authorization Decisions due to improper URL decoding logic. The pathname validation used for...

CVE-2025-64765 Astro middleware authentication checks based on url.pathname can be bypassed via url encoded values

Astro is a web framework. Prior to version 5.15.8, a mismatch exists between how Astro normalizes request paths for routing/rendering and how the application’s middleware reads the path for validation checks. Astro internally applies decodeURI to determine which route to render, while the...

CVE-2025-64765

Astro (web framework) vulnerability CVE-2025-64765 and related advisories describe a path normalization mismatch: Astro uses decodeURI for routing, while middleware reads context.url.pathname without the same normalization. This permits bypassing path-based authentication by double-encoded URLs (...