https://cve.radiocsirt.org Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Mon, 05 Oct 2026 10:38:24 +0000 https://cve.radiocsirt.org/vuln/euvd-2026-261348 EUVD-2026-261348 https://cve.radiocsirt.org/vuln/euvd-2026-261348 https://cve.radiocsirt.org/vuln/fkie_cve-2025-65019 <p>Astro is a web framework. Prior to version 5.15.9, when using Astro&#39;s Cloudflare adapter (@astrojs/cloudflare) with output: &#39;server&#39;, the image optimization endpoint (/_image) contains a critical vulnerability in the isRemoteAllowed() function that unconditionally allows data: protocol URLs. This enables Cross-Site Scripting (XSS) attacks through malicious SVG payloads, bypassing domain restrictions and Content Security Policy protections. This issue has been patched in version 5.15.9.</p> <p>Astro is a web framework. Prior to version 5.15.9, when using Astro&#39;s Cloudflare adapter (@astrojs/cloudflare) with output: &#39;server&#39;, the image optimization endpoint (/_image) contains a critical vulnerability in the isRemoteAllowed() function that unconditionally allows data: protocol URLs. This enables Cross-Site Scripting (XSS) attacks through malicious SVG payloads, bypassing domain restrictions and Content Security Policy protections. This issue has been patched in version 5.15.9.</p> https://cve.radiocsirt.org/vuln/fkie_cve-2025-65019 https://cve.radiocsirt.org/vuln/ghsa-fvmw-cj7j-j39q <p><strong>Affected:</strong> npm: astro</p> <p>**Summary** A Cross-Site Scripting (XSS) vulnerability exists in Astro when using the **@astrojs/cloudflare** adapter with `output: &#39;server&#39;`. The built-in image optimization endpoint (`/_image`) uses `isRemoteAllowed()` from Astro’s internal helpers, which **unconditionally allows `data:` URLs**. When the endpoint receives a valid `data:` URL pointing to a malicious SVG containing JavaScript, and the Cloudflare-specific implementation performs a **302 redirect back to the original `data:` URL**, the browser directly executes the embedded JavaScript. This completely bypasses any domain allow-listing (`image.domains` / `image.remotePatterns`) and typical Content Security Policy mitigations.</p> <p>**Affected Versions** - `@astrojs/cloudflare` ≤ 12.6.10 (and likely all previous versions) - Astro ≥ 4.x when used with `output: &#39;server&#39;` and the Cloudflare adapter</p> <p>**Root Cause – Vulnerable Code** File: `node_modules/@astrojs/internal-helpers/src/remote.ts`</p> <p>```ts export function isRemoteAllowed(src: string, ...): boolean { if (!URL.canParse(src)) { return false; } const url = new URL(src);</p> <p>// Data URLs are always allowed if (url.protocol === &#39;data:&#39;) { return true; }</p> <p>// Non-http(s) protocols are never allowed if (![&#39;http:&#39;, &#39;https:&#39;].includes(url.protocol)) { return false; } // ... further http/https allow-list checks } ```</p> <p>In the **Cloudflare adapter**, the `/_image` endpoint contains logic similar to:</p> <p>```ts const href = ctx.url.searchPar…</p> <p><strong>Affected:</strong> npm: astro</p> <p>**Summary** A Cross-Site Scripting (XSS) vulnerability exists in Astro when using the **@astrojs/cloudflare** adapter with `output: &#39;server&#39;`. The built-in image optimization endpoint (`/_image`) uses `isRemoteAllowed()` from Astro’s internal helpers, which **unconditionally allows `data:` URLs**. When the endpoint receives a valid `data:` URL pointing to a malicious SVG containing JavaScript, and the Cloudflare-specific implementation performs a **302 redirect back to the original `data:` URL**, the browser directly executes the embedded JavaScript. This completely bypasses any domain allow-listing (`image.domains` / `image.remotePatterns`) and typical Content Security Policy mitigations.</p> <p>**Affected Versions** - `@astrojs/cloudflare` ≤ 12.6.10 (and likely all previous versions) - Astro ≥ 4.x when used with `output: &#39;server&#39;` and the Cloudflare adapter</p> <p>**Root Cause – Vulnerable Code** File: `node_modules/@astrojs/internal-helpers/src/remote.ts`</p> <p>```ts export function isRemoteAllowed(src: string, ...): boolean { if (!URL.canParse(src)) { return false; } const url = new URL(src);</p> <p>// Data URLs are always allowed if (url.protocol === &#39;data:&#39;) { return true; }</p> <p>// Non-http(s) protocols are never allowed if (![&#39;http:&#39;, &#39;https:&#39;].includes(url.protocol)) { return false; } // ... further http/https allow-list checks } ```</p> <p>In the **Cloudflare adapter**, the `/_image` endpoint contains logic similar to:</p> <p>```ts const href = ctx.url.searchPar…</p> https://cve.radiocsirt.org/vuln/ghsa-fvmw-cj7j-j39q