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Product · sveltejs

svelte

10 known vulnerabilities.

svelte at a glance

Last 12 months
9
Critical · all time
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Exploited · all time
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New vulnerabilities per month · last 12 months
0 5 10 December 2025: 0 vulnerabilities Dec 2025 January 2026: 0 vulnerabilities February 2026: 6 vulnerabilities March 2026: 0 vulnerabilities Mar April 2026: 0 vulnerabilities May 2026: 0 vulnerabilities June 2026: 3 vulnerabilities Jun July 2026: 0 vulnerabilities August 2026: 0 vulnerabilities September 2026: 0 vulnerabilities Sep October 2026: 0 vulnerabilities November 2026: 0 vulnerabilities
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10 results · Feed

  • Medium 5.1

    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 externa…

  • Medium 5.9

    Svelte: ReDoS in `<svelte:element>` Tag Validation

    Svelte is a performance oriented web framework. From version 5.51.5 to before version 5.55.7, an internal regex in the Svelte runtime can take exponential time to test in <svelte:element this={tag}></svelte:element>. This issue has been patched in version 5.5…

  • Medium 5.3

    Svelte: XSS via DOM Clobbering of Internal Framework State

    Svelte is a performance oriented web framework. Prior to version 5.55.7, Svelte was vulnerable to DOM clobbering of its internal framework state on elements, potentially leading to XSS attacks. This issue has been patched in version 5.55.7.

  • Medium 5.3

    Svelte Vulnerable to XSS via HTML Comment Injection in SSR Error Boundary Hydration Markers

    Svelte performance oriented web framework. Prior to version 5.53.5, errors from `transformError` were not correctly escaped prior to being embedded in the HTML output, causing potential HTML injection and XSS if attacker-controlled content is returned from `t…

  • Medium 5.3

    Svelte vulnerable to XSS during SSR with contenteditable `bind:innerText` and `bind:textContent`

    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 u…

  • Medium 5.3

    Svelte SSR attribute spreading includes inherited properties from prototype chain

    svelte performance oriented web framework. Prior to 5.51.5, in server-side rendering, attribute spreading on elements (e.g. <div {...attrs}>) enumerates inherited properties from the object's prototype chain rather than only own properties. In environments wh…

  • Medium 5.1

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

    svelte performance oriented web framework. Prior to 5.51.5, when using <svelte:element this={tag}> 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 c…

  • Medium 5.1

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

    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 i…

  • Medium 5.1

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

    svelte performance oriented web framework. From 5.39.3, <=5.51.4, in certain circumstances, the server-side rendering output of an <option> element does not properly escape its content, potentially allowing HTML injection in the SSR output. Client-side render…

  • Medium 5.4

    Potential mXSS vulnerability due to improper HTML escaping in svelte

    svelte performance oriented web framework. A potential mXSS vulnerability exists in Svelte for versions up to but not including 4.2.19. Svelte improperly escapes HTML on server-side rendering. The assumption is that attributes will always stay as such, but in…