CVE-2026-27739 Angular SSR is vulnerable to SSRF and Header Injection via request handling pipeline

The Angular SSR is a server-rise rendering tool for Angular applications. Versions prior to 21.2.0-rc.1, 21.1.5, 20.3.17, and 19.2.21 have a Server-Side Request Forgery SSRF vulnerability in the Angular SSR request handling pipeline. The vulnerability exists because Angular’s internal URL...

CVE-2026-27739

The Angular SSR is a server-rise rendering tool for Angular applications. Versions prior to 21.2.0-rc.1, 21.1.5, 20.3.17, and 19.2.21 have a Server-Side Request Forgery SSRF vulnerability in the Angular SSR request handling pipeline. The vulnerability exists because Angular’s internal URL...

CVE-2026-27739 Angular SSR is vulnerable to SSRF and Header Injection via request handling pipeline

The Angular SSR is a server-rise rendering tool for Angular applications. Versions prior to 21.2.0-rc.1, 21.1.5, 20.3.17, and 19.2.21 have a Server-Side Request Forgery SSRF vulnerability in the Angular SSR request handling pipeline. The vulnerability exists because Angular’s internal URL...

CVE-2026-27739

CVE-2026-27739 affects Angular SSR, with an SSRF vulnerability in the request handling pipeline. Versions prior to 21.2.0-rc.1, 21.1.5, 20.3.17, and 19.2.21 allow unvalidated Host and X-Forwarded-* headers to influence base-origin URL construction, enabling arbitrary internal request steering via...

CVE-2026-27738

CVE-2026-27738 describes an open redirect in Angular SSR’s internal URL processing. In affected Angular SSR versions on the 19.x branch prior to 19.2.21, 20.x prior to 20.3.17, and 21.x prior to 21.1.5 and 21.2.0-rc.1, the logic that normalizes URL segments by stripping a single leading slash can...

CVE-2026-27738

The Angular SSR is a server-rise rendering tool for Angular applications. An Open Redirect vulnerability exists in the internal URL processing logic in versions on the 19.x branch prior to 19.2.21, the 20.x branch prior to 20.3.17, and the 21.x branch prior to 21.1.5 and 21.2.0-rc.1. The logic...

CVE-2026-27738 Angular SSR has an Open Redirect via X-Forwarded-Prefix

The Angular SSR is a server-rise rendering tool for Angular applications. An Open Redirect vulnerability exists in the internal URL processing logic in versions on the 19.x branch prior to 19.2.21, the 20.x branch prior to 20.3.17, and the 21.x branch prior to 21.1.5 and 21.2.0-rc.1. The logic...

CVE-2026-25545

Astro is a web framework. Prior to version 9.5.4, Server-Side Rendered pages that return an error with a prerendered custom error page eg. 404.astro or 500.astro are vulnerable to SSRF. If the Host: header is changed to an attacker's server, it will be fetched on /500.html and they can redirect...

PT-2026-21961

Name of the Vulnerable Software and Affected Versions Angular SSR versions 19.x through 19.2.20 Angular SSR versions 20.x through 20.3.16 Angular SSR versions 21.x through 21.1.4 Angular SSR version 21.2.0-rc.0 Description An Open Redirect issue exists in the internal URL processing logic of...

PT-2026-21966

Name of the Vulnerable Software and Affected Versions Angular SSR versions prior to 21.2.0-rc.1, 21.1.5, 20.3.17, and 19.2.21 Description Angular SSR, a server-side rendering tool for Angular applications, contains a Server-Side Request Forgery SSRF issue in its request handling pipeline. The...

CVE-2026-27729 Astro has memory exhaustion DoS due to missing request body size limit in Server Actions

Astro is a web framework. In versions 9.0.0 through 9.5.3, Astro server actions have no default request body size limit, which can lead to memory exhaustion DoS. A single large POST to a valid action endpoint can crash the server process on memory-constrained deployments. On-demand rendered sites...

CVE-2026-25545

Astro SSRF in error rendering via Host header (CVE-2026-25545). Affected: Astro until version 9.5.4 and @astrojs/node before 9.5.4. Vulnerability arises when SSR error pages (e.g., 404/500) prerendered content fetches a URL constructed from the Host header, enabling an attacker to redirect to int...

CVE-2026-25545 Astro has Full-Read SSRF in error rendering via Host: header injection

Astro is a web framework. Prior to version 9.5.4, Server-Side Rendered pages that return an error with a prerendered custom error page eg. 404.astro or 500.astro are vulnerable to SSRF. If the Host: header is changed to an attacker's server, it will be fetched on /500.html and they can redirect...

CVE-2026-25545 Astro has Full-Read SSRF in error rendering via Host: header injection

Astro is a web framework. Prior to version 9.5.4, Server-Side Rendered pages that return an error with a prerendered custom error page eg. 404.astro or 500.astro are vulnerable to SSRF. If the Host: header is changed to an attacker's server, it will be fetched on /500.html and they can redirect...

CVE-2026-25545

Astro is a web framework. Prior to version 9.5.4, Server-Side Rendered pages that return an error with a prerendered custom error page eg. 404.astro or 500.astro are vulnerable to SSRF. If the Host: header is changed to an attacker's server, it will be fetched on /500.html and they can redirect...

Astro code issues and vulnerabilities

Astro is a content-driven website framework developed by Astro OpenSource. Versions of Astro prior to 9.5.4 had code vulnerabilities. These vulnerabilities stemmed from server-side rendering of pages, where errors were handled through server-side request forgeing, potentially allowing attackers t...

CVE-2026-25545: Server-Side Request Forgery (SSRF)

Astro is a web framework. Prior to version 9.5.4, Server-Side Rendered pages that return an error with a prerendered custom error page eg. 404.astro or 500.astro are vulnerable to SSRF. If the Host: header is changed to an attacker's server, it will be fetched on /500.html and they can redirect...

Astro has Full-Read SSRF in error rendering via Host: header injection

Summary Server-Side Rendered pages that return an error with a prerendered custom error page eg. 404.astro or 500.astro are vulnerable to SSRF. If the Host: header is changed to an attacker's server, it will be fetched on /500.html and they can redirect this to any internal URL to read the respon...

GHSA-QQ67-MVV5-FW3G Astro has Full-Read SSRF in error rendering via Host: header injection

Summary Server-Side Rendered pages that return an error with a prerendered custom error page eg. 404.astro or 500.astro are vulnerable to SSRF. If the Host: header is changed to an attacker's server, it will be fetched on /500.html and they can redirect this to any internal URL to read the respon...

CVE-2026-27121

svelte performance oriented web framework. Versions of svelte prior to 5.51.5 are vulnerable to cross-site scripting XSS during server-side rendering. When using spread syntax to render attributes from untrusted data, event handler properties are included in the rendered HTML output. If an...