CVE-2026-42599 Cross-site scripting via spread attributes in Svelte SSR

Svelte is a performance oriented web framework. Prior to version 5.55.7, when using spread syntax to render attributes from untrusted data, event handler properties are included in the rendered HTML output. If an application spreads user-controlled or external data as element attributes, an...

NPM: Svelte Vulnerable to XSS via DOM Clobbering of Internal Framework State

NPM: Svelte Vulnerable to XSS via DOM Clobbering of Internal Framework State vulnerability discovered by ? in WordPress Npm svelte versions = 5.55.6...

org.webjars.npm:event-calendar__core (>=3.1.0 <=3.7.1), org.webjars.npm:event-calendar__day-grid (=3.6.2) +2 more potentially affected by CVE-2026-42573 via org.webjars.npm:svelte (>=3.20.1 <=4.2.19)

org.webjars.npm:svelte MAVEN version =3.20.1, =3.1.0, =3.1.0, =3.6.2 - org.webjars.npm:stylesheet-switcher =3.0.0 Source cves: CVE-2026-42573 Source advisory: SNYK:JAVA-ORGWEBJARSNPM-16697542...

org.webjars.npm:event-calendar__core (>=3.1.0 <=3.7.1), org.webjars.npm:event-calendar__day-grid (=3.6.2) +2 more potentially affected by CVE-2026-42599 via org.webjars.npm:svelte (>=3.20.1 <=4.2.19)

org.webjars.npm:svelte MAVEN version =3.20.1, =3.1.0, =3.1.0, =3.6.2 - org.webjars.npm:stylesheet-switcher =3.0.0 Source cves: CVE-2026-42599 Source advisory: SNYK:JAVA-ORGWEBJARSNPM-16697616...

Cross-site Scripting (XSS)

Overview svelte is a package for building web applications. Affected versions of this package are vulnerable to Cross-site Scripting XSS in the rendering of attributes using spread syntax from untrusted data, which includes event handler properties in the HTML output. An attacker can execute...

@budibase/server (>=3.32.1 <=3.38.1), @builders-of-stuff/svelte-sui-wallet-adapter (>=0.6.6 <=2.1.0) +56 more potentially affected by CVE-2026-27901 via svelte (>=5.0.0-next.1 <=5.53.3)

svelte NPM version =5.0.0-next.1, =3.32.1, =0.6.6, =4.0.0-alpha.1, =4.0.0-alpha.1, =0.1.0, =0.0.1, =1.3.0, =0.1.4, =0.0.20, =0.15.0, =1.1.0-beta.0, =5.0.0-next.80, =0.1.1-alpha.24, =0.1.3-next.2 and more Source cves: CVE-2026-27901 Source advisory: SNYK:JS-SVELTE-15353449...

CVE-2026-27901

Svelte performance oriented web framework. Prior to version 5.53.5, the contents of bind:innerText and bind:textContent on contenteditable elements were not properly escaped. This could enable HTML injection and Cross-Site Scripting XSS if rendering untrusted data as the binding's initial value o...

Svelte 跨站脚本漏洞

Svelte is an open-source approach to building web applications developed by Svelte. Versions of Svelte prior to 5.51.5 contained a cross-site scripting vulnerability. This vulnerability stemmed from the lack of validation or cleanup of tag names during server-side rendering, which could lead to...

Svelte 安全漏洞

Svelte is an open-source approach to building web applications developed by Svelte. Versions of Svelte prior to 5.51.5 have a security vulnerability. This vulnerability arises from server-side rendering, where property extensions enumerate inherited properties, which may lead to unexpected proper...

@budibase/server (>=3.32.1 <=3.38.1), @builders-of-stuff/svelte-sui-wallet-adapter (>=0.6.6 <=2.1.0) +53 more potentially affected by CVE-2026-27121 via svelte (>=5.0.0-next.1 <=5.51.2)

svelte NPM version =5.0.0-next.1, =3.32.1, =0.6.6, =4.0.0-alpha.1, =4.0.0-alpha.1, =0.1.0, =0.0.1, =1.3.0, =0.1.4, =0.0.20, =0.15.0, =1.1.0-beta.0, =5.0.0-next.80, =0.1.1-alpha.24, =0.1.3-next.2 and more Source cves: CVE-2026-27121 Source advisory: SNYK:JS-SVELTE-15322788...

@alexanderniebuhr/eslint-config (>=1.3.0 <=1.4.0), @alexanderniebuhr/style (>=1.1.0 <=1.3.0) +171 more potentially affected by unknown CVE via svelte (>=3.12.1 <=3.59.1)

svelte NPM version =3.12.1, =1.3.0, =1.1.0, =1.3.0, =1.0.3, =0.0.999-alpha.30, =10.0.0, =7.1.4, =21.0.4, =8.0.4, =2.0.4, =1.0.1, =6.0.4, =12.1.1 and more Source cves: unknown CVE Source advisory: SNYK:JS-SVELTE-15032658...

CVE-2025-15265

A flaw was found in Svelte. A remote attacker can exploit this Cross-Site Scripting XSS vulnerability during asynchronous hydration by providing specially crafted input. This input, when processed, allows for the injection of arbitrary JavaScript into a user's browser due to improper escaping of...

svelte vulnerable to Cross-site Scripting

Summary An XSS vulnerability exists in Svelte 5.46.0-2 resulting from improper escaping of hydratable keys. If these keys incorporate untrusted user input, arbitrary JavaScript can be injected into server-rendered HTML. Details When using the hydratable function, the first argument is used as a k...

EUVD-2022-6441

Malicious code in bioql PyPI...

Cross Site Scripting(XSS)

Svelte is vulnerable to Cross-Site Scripting XSS. The vulnerability is due to improper HTML escaping during server-side rendering, allowing an attacker to inject malicious content and execute unauthorized scripts in the victim's browser...

5sg (>=0.0.2 <=0.0.8), @1stg/app-config (>=4.0.0 <=7.3.0) +2072 more potentially affected by CVE-2024-45047 via svelte (>=0.0.1 <=4.2.18)

svelte NPM version =0.0.1, =0.0.2, =4.0.0, =4.0.0, =6.0.0, =2.2.0, =1.0.0, =0.0.1, =0.0.1, =0.0.1, =10.9.0, =0.0.1, =0.1.0, =1.0.0, =1.0.0, =2.0.0 - @albertaz/r2s-cli =1.0.1-alpha.0 and more Source cves: CVE-2024-45047 Source advisory: OSV:GHSA-8266-84WP-WV5C...