Allocation of Resources Without Limits or Throttling

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 Allocation of Resources Without Limits or Throttling in parseRequestBody, when parsing Server Action requests. Attackers can trigger ...

GHSA-HR2Q-HP5Q-X767 Astro vulnerable to URL manipulation via headers, leading to middleware and CVE-2025-61925 bypass

Summary In impacted versions of Astro using on-demand rendering, request headers x-forwarded-proto and x-forwarded-port are insecurely used, without sanitization, to build the URL. This has several consequences the most important of which are: - Middleware-based protected route bypass only via...

Astro vulnerable to URL manipulation via headers, leading to middleware and CVE-2025-61925 bypass

Summary In impacted versions of Astro using on-demand rendering, request headers x-forwarded-proto and x-forwarded-port are insecurely used, without sanitization, to build the URL. This has several consequences the most important of which are: - Middleware-based protected route bypass only via...

CVE-2025-64525

Astro is a web framework. In Astro versions 2.16.0 up to but excluding 5.15.5 which utilizeon-demand rendering, request headers x-forwarded-proto and x-forwarded-port are insecurely used, without sanitization, to build the URL. This has several consequences, the most important of which are:...

GHSA-5FF5-9FCW-VG88 Astro's `X-Forwarded-Host` is reflected without validation

Summary When running Astro in on-demand rendering mode using a adapter such as the node adapter it is possible to maliciously send an X-Forwarded-Host header that is reflected when using the recommended Astro.url property as there is no validation that the value is safe. Details Astro reflects th...

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

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 Externally-Controlled Input to Select Classes or Code 'Unsafe Reflection' via the X-Forwarded-Host header when using the...

Astro's `X-Forwarded-Host` is reflected without validation

Summary When running Astro in on-demand rendering mode using a adapter such as the node adapter it is possible to maliciously send an X-Forwarded-Host header that is reflected when using the recommended Astro.url property as there is no validation that the value is safe. Details Astro reflects th...

CVE-2025-61925

Astro is a web framework. Prior to version 5.14.2, Astro reflects the value in X-Forwarded-Host in output when using Astro.url without any validation. It is common for web servers such as nginx to route requests via the Host header, and forward on other request headers. As such as malicious reque...

CVE-2025-55303

Astro is a web framework for content-driven websites. In versions of astro before 5.13.2 and 4.16.18, the image optimization endpoint in projects deployed with on-demand rendering allows images from unauthorized third-party domains to be served. On-demand rendered sites built with Astro include a...

CVE-2025-55303

Astro is a web framework for content-driven websites. In versions of astro before 5.13.2 and 4.16.18, the image optimization endpoint in projects deployed with on-demand rendering allows images from unauthorized third-party domains to be served. On-demand rendered sites built with Astro include a...

CVE-2025-55303 Unauthorized third-party images in Astro’s _image endpoint

Astro is a web framework for content-driven websites. In versions of astro before 5.13.2 and 4.16.18, the image optimization endpoint in projects deployed with on-demand rendering allows images from unauthorized third-party domains to be served. On-demand rendered sites built with Astro include a...

CVE-2025-55303 Unauthorized third-party images in Astro’s _image endpoint

Astro is a web framework for content-driven websites. In versions of astro before 5.13.2 and 4.16.18, the image optimization endpoint in projects deployed with on-demand rendering allows images from unauthorized third-party domains to be served. On-demand rendered sites built with Astro include a...

CVE-2025-55303

Astro before 5.13.2 and 4.16.18 has an information disclosure vulnerability in the on-demand rendering image optimization endpoint (_image) that can bypass third-party domain restrictions using protocol-relative URLs (e.g., /_image?href=//example.com/image.png). This allows serving images from un...

CVE-2025-55303 Unauthorized third-party images in Astro’s _image endpoint

Astro is a web framework for content-driven websites. In versions of astro before 5.13.2 and 4.16.18, the image optimization endpoint in projects deployed with on-demand rendering allows images from unauthorized third-party domains to be served. On-demand rendered sites built with Astro include a...

Astro allows unauthorized third-party images in _image endpoint

Summary In affected versions of astro, the image optimization endpoint in projects deployed with on-demand rendering allows images from unauthorized third-party domains to be served. Details On-demand rendered sites built with Astro include an /image endpoint which returns optimized versions of...

GHSA-XF8X-J4P2-F749 Astro allows unauthorized third-party images in _image endpoint

Summary In affected versions of astro, the image optimization endpoint in projects deployed with on-demand rendering allows images from unauthorized third-party domains to be served. Details On-demand rendered sites built with Astro include an /image endpoint which returns optimized versions of...

Cross-site Scripting (XSS)

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 Cross-site Scripting XSS via the /image endpoint. An attacker can cause loading of unauthorized third-party images, including...

Cross-site Scripting (XSS)

Overview @astrojs/internal-helpers is an Internal helpers used by core Astro packages. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the /image endpoint. An attacker can cause loading of unauthorized third-party images, including potentially malicious SVG files,...

PT-2025-33828

Name of the Vulnerable Software and Affected Versions: Astro versions prior to 5.13.2 Astro versions prior to 4.16.18 Description: Astro is a web framework for content-driven websites. The image optimization endpoint in projects deployed with on-demand rendering allows images from unauthorized...

Astros's duplicate trailing slash feature leads to an open redirection security issue

Summary There is an Open Redirection vulnerability in the trailing slash redirection logic when handling paths with double slashes. This allows an attacker to redirect users to arbitrary external domains by crafting URLs such as https://mydomain.com//malicious-site.com/. This increases the risk o...