Astro SSR - Server-Side Request Forgery

Astro before 5.17.3 and @astrojs/node before 9.5.4 are vulnerable to full-read SSRF due to improper Host header validation in error page rendering, allowing attackers to redirect requests and access internal resources. id: CVE-2026-25545 info: name: Astro SSR - Server-Side Request Forgery author:...

Astro - Unauthorized Third-Party Image Access

Astro 5.13.2 and 4.16.18 contains an information disclosure vulnerability caused by improper validation of protocol-relative URLs in the image optimization endpoint, letting attackers serve images from unauthorized third-party domains, exploit requires on-demand rendering deployment. id:...

Astro - Information Disclosure

Astro versions v5.0.3 through v5.0.7 and Astro v4.16.17 or older with sourcemaps enabled contain a source code disclosure caused by sourcemap files being publicly accessible in the build output folder, letting unauthenticated users read server source code, exploit requires sourcemaps to be enable...

Astro SSR - Open Redirect

Astro 5.2.0 through 5.12.7 contains an open redirect caused by improper handling of paths with double slashes in trailing slash redirection logic, letting attackers redirect users to arbitrary external domains, exploit requires on-demand SSR with Node or Cloudflare adapters. id: CVE-2025-54793...

Astro Cloudflare Adapter - Server Side Request Forgery

Astro is a web framework for content-driven websites. Versions 11.0.3 through 12.6.5 are vulnerable to SSRF when using Astro's Cloudflare adapter. When configured with output: 'server' while using the default imageService: 'compile', the generated image optimization endpoint doesn't check the URL...

CVE-2026-59731

Astro is a web framework for content-driven websites. Version 6.4.7 performs authorization decisions on a partially decoded pathname after reaching the iterative URL decoder limit, while later rewrite route matching performs an additional decodeURI operation and can resolve the request to a...

CVE-2026-59731

Astro 6.4.7 contains an authorization bypass due to improper handling of partially decoded pathnames after the iterative URL decoder limit, with an additional decodeURI() during rewrite route matching that can lead to accessing a protected route. The issue affects 6.4.7 and is fixed in 6.4.8. The...

CVE-2026-59731 Astro 6.4.7 Authorization Bypass via Decode Iteration Limit and Rewrite Path Canonicalization Mismatch

Astro is a web framework for content-driven websites. Version 6.4.7 performs authorization decisions on a partially decoded pathname after reaching the iterative URL decoder limit, while later rewrite route matching performs an additional decodeURI operation and can resolve the request to a...

PT-2026-56516

Name of the Vulnerable Software and Affected Versions Astro version 6.4.7 Description Astro performs authorization decisions on a partially decoded pathname after reaching the iterative URL decoder limit. Subsequently, rewrite route matching performs an additional decodeURI operation, which can...

CVE-2026-54298

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 ...

CVE-2026-50146

Astro is a web framework. Prior to 6.3.3, when a component uses a client: directive, Astro inserts named slot content into a data-astro-template attribute without HTML escaping the slot name allowing an attacker to break out of the attribute context and inject arbitrary HTML, resulting in reflect...

CVE-2026-54299

Summary of CVE-2026-54299 (Astro) : Astro SSR apps that prerender error pages (e.g., 404/500 with prerender = true) fetch those pages over HTTP using a URL derived from request.url, which is based on the Host header. If Host is not validated against allowedDomains, an attacker can direct the fetc...

CVE-2026-54299

Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages /404 or /500 using export const prerender = true fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from request.url, which in turn gets its origin from the incoming...

CVE-2026-54299 Astro: Host-header full-read SSRF in core prerendered error-page fetch (prerenderedErrorPageFetch default + unvalidated createRequestFromNodeRequest URL)

Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages /404 or /500 using export const prerender = true fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from request.url, which in turn gets its origin from the incoming...

CVE-2026-54298

Astro, prior to 6.4.6, is vulnerable to XSS via unescaped attribute names when spreading props onto HTML elements. The spreadAttributes path iterates over object keys and passes them to addAttribute, which interpolates the key into the HTML output without escaping, allowing attackers to inject ev...

CVE-2026-54298

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 ...

CVE-2026-54298 Astro: XSS via Unescaped Attribute Names in Spread Props

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 ...

CVE-2026-50146 Astro: Reflected XSS via unescaped slot name

Astro is a web framework. Prior to 6.3.3, when a component uses a client: directive, Astro inserts named slot content into a data-astro-template attribute without HTML escaping the slot name allowing an attacker to break out of the attribute context and inject arbitrary HTML, resulting in reflect...

CVE-2026-50146

Astro is a web framework. Prior to 6.3.3, when a component uses a client: directive, Astro inserts named slot content into a data-astro-template attribute without HTML escaping the slot name allowing an attacker to break out of the attribute context and inject arbitrary HTML, resulting in reflect...

CVE-2026-50146

CVE-2026-50146 affects the Astro web framework prior to 6.3.3. When a component uses a client:* directive, Astro inserts named slot content into a data-astro-template attribute without escaping the slot name, allowing an attacker to break out of the attribute context and inject arbitrary HTML, re...