Improperly Controlled Modification of Dynamically-Determined Object Attributes

Overview org.webjars.npm:svelte is a package for building web applications. Affected versions of this package are vulnerable to Improperly Controlled Modification of Dynamically-Determined Object Attributes in server-side rendering when attribute spreading is performed on elements. An attacker ca...

@budibase/server (>=3.32.1, <=3.38.1), @builders-of-stuff/svelte-sui-wallet-adapter (>=0.6.6, <=2.1.0) +52 more potentially affected by CVE-2026-27125 via svelte (>=5.0.0, <=5.51.2)

svelte NPM version =5.0.0, =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-beta.2, =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-2026-27125 Source advisory: OSV:GHSA-CRPF-4HRX-3JRP...

@budibase/server (>=3.32.1, <=3.38.1), @builders-of-stuff/svelte-sui-wallet-adapter (>=0.6.6, <=2.1.0) +52 more potentially affected by CVE-2026-27122 via svelte (>=5.0.0, <=5.51.2)

svelte NPM version =5.0.0, =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-beta.2, =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-2026-27122 Source advisory: SNYK:JS-SVELTE-15322733...

@budibase/server (>=3.32.1, <=3.38.1), @builders-of-stuff/svelte-sui-wallet-adapter (>=0.6.6, <=2.1.0) +52 more potentially affected by CVE-2026-27122 via svelte (>=5.0.0, <=5.51.2)

svelte NPM version =5.0.0, =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-beta.2, =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-2026-27122 Source advisory: OSV:GHSA-M56Q-VW4C-C2CP...

Svelte SSR does not validate dynamic element tag names in `<svelte:element>`

When using in server-side rendering, the provided tag name is not validated or sanitized before being emitted into the HTML output. If the tag string contains unexpected characters, it can result in HTML injection in the SSR output. Client-side rendering is not affected...

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 via the svelte:element tags. An attacker can inject arbitrary HTML into the server-side rendered output by supplying a crafted tag name. Details Cross-site...

GHSA-M56Q-VW4C-C2CP Svelte SSR does not validate dynamic element tag names in `<svelte:element>`

When using in server-side rendering, the provided tag name is not validated or sanitized before being emitted into the HTML output. If the tag string contains unexpected characters, it can result in HTML injection in the SSR output. Client-side rendering is not affected...

Cross-site Scripting (XSS)

Overview org.webjars.npm:svelte is a package for building web applications. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the svelte:element tags. An attacker can inject arbitrary HTML into the server-side rendered output by supplying a crafted tag name. Details...

@budibase/server (>=3.32.1, <=3.38.1), @builders-of-stuff/svelte-sui-wallet-adapter (>=0.6.6, <=2.1.0) +52 more potentially affected by CVE-2026-27121 via svelte (>=5.0.0, <=5.51.2)

svelte NPM version =5.0.0, =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-beta.2, =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: OSV:GHSA-F7GR-6P89-R883...

GHSA-F7GR-6P89-R883 Svelte affected by cross-site scripting via spread attributes in Svelte SSR

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 application spreads user-controlled or external...

Svelte affected by cross-site scripting via spread attributes in Svelte SSR

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 application spreads user-controlled or external...

Cross-site Scripting (XSS)

Overview org.webjars.npm:svelte is a package for building web applications. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the spread syntax when rendering attributes from untrusted data during server-side rendering. An attacker can execute arbitrary JavaScript i...

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 via the spread syntax when rendering attributes from untrusted data during server-side rendering. An attacker can execute arbitrary JavaScript in the context of...

@budibase/server (>=3.32.1, <=3.38.1), @builders-of-stuff/svelte-sui-wallet-adapter (>=0.6.6, <=2.1.0) +52 more potentially affected by CVE-2026-27121 via svelte (>=5.0.0, <=5.51.2)

svelte NPM version =5.0.0, =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-beta.2, =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...

@budibase/server (>=3.32.1, <=3.38.1), @burger-editor/client (>=4.0.0-alpha.26, <=4.0.0-alpha.61) +19 more potentially affected by CVE-2026-27119 via svelte (>=5.39.5, <=5.51.2)

svelte NPM version =5.39.5, =3.32.1, =4.0.0-alpha.26, =0.15.0-beta.2, =6.0.0, =2.4.0, =1.17.2, =0.1.2-alpha.1, =0.4.11, =0.0.3-next.1, =0.0.3-next.6 - dumbo-svelte 0.3.0 and more Source cves: CVE-2026-27119 Source advisory: SNYK:JS-SVELTE-15322810...

GHSA-H7H7-MM68-GMRC Svelte affected by XSS in SSR `<option>` element

In certain circumstances, the server-side rendering output of an element does not properly escape its content, potentially allowing HTML injection in the SSR output. Client-side rendering is not affected...

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 via the server-side rendering process of the element, which does not properly escape its content. An attacker can inject arbitrary HTML into the SSR output by...

@budibase/server (>=3.32.1, <=3.38.1), @burger-editor/client (>=4.0.0-alpha.26, <=4.0.0-alpha.61) +19 more potentially affected by CVE-2026-27119 via svelte (>=5.39.5, <=5.51.2)

svelte NPM version =5.39.5, =3.32.1, =4.0.0-alpha.26, =0.15.0-beta.2, =6.0.0, =2.4.0, =1.17.2, =0.1.2-alpha.1, =0.4.11, =0.0.3-next.1, =0.0.3-next.6 - dumbo-svelte 0.3.0 and more Source cves: CVE-2026-27119 Source advisory: OSV:GHSA-H7H7-MM68-GMRC...

Svelte affected by XSS in SSR `<option>` element

In certain circumstances, the server-side rendering output of an element does not properly escape its content, potentially allowing HTML injection in the SSR output. Client-side rendering is not affected...

PT-2026-21305

Name of the Vulnerable Software and Affected Versions Svelte versions 5.39.3 through 5.51.4 Description Svelte is susceptible to a flaw where, under specific conditions, the server-side rendering of an element fails to properly escape its content. This can lead to potential HTML injection within...