CVE-2026-50146: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)

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...

@constructions-incongrues/faircamp-cms-ui (>=0.1.0, <=0.2.1), @lightnet/sveltia-admin (>=4.0.0, <=4.0.13) +1 more potentially affected by unknown CVE via @sveltia/cms (>=0.73.1, <=0.167.1)

@sveltia/cms NPM version =0.73.1, =0.1.0, =4.0.0, =0.1.2, =0.1.5 Source cves: unknown CVE Source advisory: GHSA-H5JC-78HR-3PC9...

Improper Access Control

@astrojs/netlify is vulnerable to Improper Access Control. The vulnerability is due to overly permissive conversion of Astro image.remotePatterns into Netlify Image CDN regular expressions, which allows an attacker to bypass intended hostname and pathname restrictions and access unintended remote...

Cross-site Scripting (XSS)

Astro is vulnerable to Cross-Site Scripting XSS. The vulnerability is due to improper HTML escaping of named slot content inserted into the data-astro-template attribute when using client: directives, which allows an attacker to break out of the attribute context and inject arbitrary HTML or...

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 addAttribute function, which interpolates unescaped object keys as HTML attribute names when spreadi...

GHSA-JRPJ-WCV7-9FH9 Astro: XSS via Unescaped Attribute Names in Spread Props

Summary 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 on an HTML element and the object...

@a1st/aix (>=0.0.3, <=0.8.0), @a1st/aix-core (>=0.2.0, <=0.8.0) +18 more potentially affected by CVE-2026-54298 via astro (>=6.0.0-beta.1, <=6.4.4)

astro NPM version =6.0.0-beta.1, =0.0.3, =0.2.0, =1.11.1, =2.7.0, =0.3.0, =1.4.1, =0.19.0, =0.19.0, =1.10.0, =1.0.0, =1.1.0 and more Source cves: CVE-2026-54298 Source advisory: SNYK:JS-ASTRO-17356187...

@a1st/aix (>=0.0.3, <=0.8.0), @a1st/aix-core (>=0.2.0, <=0.8.0) +18 more potentially affected by CVE-2026-54298 via astro (>=6.0.0-beta.1, <=6.4.4)

astro NPM version =6.0.0-beta.1, =0.0.3, =0.2.0, =1.11.1, =2.7.0, =0.3.0, =1.4.1, =0.19.0, =0.19.0, =1.10.0, =1.0.0, =1.1.0 and more Source cves: CVE-2026-54298 Source advisory: OSV:GHSA-JRPJ-WCV7-9FH9...

@a1st/aix (>=0.0.3, <=0.8.0), @a1st/aix-core (>=0.2.0, <=0.8.0) +18 more potentially affected by CVE-2026-54298 via astro (>=6.0.0-beta.1, <=6.4.4)

astro NPM version =6.0.0-beta.1, =0.0.3, =0.2.0, =1.11.1, =2.7.0, =0.3.0, =1.4.1, =0.19.0, =0.19.0, =1.10.0, =1.0.0, =1.1.0 and more Source cves: CVE-2026-54298 Source advisory: GHSA-JRPJ-WCV7-9FH9...

@a1st/aix (>=0.0.3, <=0.8.0), @a1st/aix-core (>=0.2.0, <=0.8.0) +18 more potentially affected by CVE-2026-54299 via astro (>=6.0.0-beta.1, <=6.4.4)

astro NPM version =6.0.0-beta.1, =0.0.3, =0.2.0, =1.11.1, =2.7.0, =0.3.0, =1.4.1, =0.19.0, =0.19.0, =1.10.0, =1.0.0, =1.1.0 and more Source cves: CVE-2026-54299 Source advisory: OSV:GHSA-2PVR-WF23-7PC7...

@a1st/aix (>=0.0.3, <=0.8.0), @a1st/aix-core (>=0.2.0, <=0.8.0) +18 more potentially affected by CVE-2026-54299 via astro (>=6.0.0-beta.1, <=6.4.4)

astro NPM version =6.0.0-beta.1, =0.0.3, =0.2.0, =1.11.1, =2.7.0, =0.3.0, =1.4.1, =0.19.0, =0.19.0, =1.10.0, =1.0.0, =1.1.0 and more Source cves: CVE-2026-54299 Source advisory: GHSA-2PVR-WF23-7PC7...

@a1st/aix (>=0.0.3, <=0.8.0), @a1st/aix-core (>=0.2.0, <=0.8.0) +18 more potentially affected by CVE-2026-54299 via astro (>=6.0.0-beta.1, <=6.4.4)

astro NPM version =6.0.0-beta.1, =0.0.3, =0.2.0, =1.11.1, =2.7.0, =0.3.0, =1.4.1, =0.19.0, =0.19.0, =1.10.0, =1.0.0, =1.1.0 and more Source cves: CVE-2026-54299 Source advisory: SNYK:JS-ASTRO-17356189...

NPM: Astro: Host header SSRF in prerendered error page fetch

NPM: Astro: Host header SSRF in prerendered error page fetch vulnerability discovered by ? in WordPress Npm astro versions 6.4.6...

Astro: Host header SSRF in prerendered error page fetch

Summary 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 Host header. When the Host header i...

Server-side Request Forgery (SSRF)

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 Server-side Request Forgery SSRF via the prerenderedErrorPageFetch. An attacker can access sensitive information or interact with...

Astro: Reflected XSS via unescaped slot name

Summary 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 reflected XSS during SSR. This is similar...

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 data-astro-template attribute when a component uses a client: directive and the slot name is not...

@a1st/aix (>=0.0.3, <=0.8.0), @a1st/aix-core (>=0.2.0, <=0.8.0) +17 more potentially affected by CVE-2026-50146 via astro (>=6.0.0-beta.1, <=6.3.1)

astro NPM version =6.0.0-beta.1, =0.0.3, =0.2.0, =1.11.1, =2.7.0, =0.3.0, =1.4.1, =0.19.0, =0.19.0, =1.10.0, =1.0.0, =1.4.2, =1.4.8 and more Source cves: CVE-2026-50146 Source advisory: OSV:GHSA-8HV8-536X-4WQP...

@a1st/aix (>=0.0.3, <=0.8.0), @a1st/aix-core (>=0.2.0, <=0.8.0) +17 more potentially affected by CVE-2026-50146 via astro (>=6.0.0-beta.1, <=6.3.1)

astro NPM version =6.0.0-beta.1, =0.0.3, =0.2.0, =1.11.1, =2.7.0, =0.3.0, =1.4.1, =0.19.0, =0.19.0, =1.10.0, =1.0.0, =1.4.2, =1.4.8 and more Source cves: CVE-2026-50146 Source advisory: GHSA-8HV8-536X-4WQP...

GHSA-8HV8-536X-4WQP Astro: Reflected XSS via unescaped slot name

Summary 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 reflected XSS during SSR. This is similar...