Vendor
Svelte vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 30 vulnerabilities in Svelte: 1 in the last 7 days and 19 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-123563, was published on 8 November 2026. 6 vulnerabilities in the last four weeks, down 14% on the four before (7). 3 technologies have a page of their own.
- Last 7 days
- 1
- Last 90 days
- 19
- Critical, all time
- 0
- Exploited in the wild
- 0
About Svelte
Svelte is a community-driven project that provides tools for building user interfaces.
Svelte technologies
Latest Svelte vulnerabilities
- CVE-2026-123563: Devalue validation bypass in ArrayBuffer reviverhighCVSS 7.5
- SvelteKit open redirect in enhanced form actionsmediumCVSS 4.7
- SvelteKit XSS via cache-control header in prerendered pagesmediumCVSS 4.7
- CVE-2026-114063: SvelteKit path traversal in vite preview server on WindowshighCVSS 7.5
- CVE-2026-114062: SvelteKit server-side request forgery in self-fetch fallbacksmediumCVSS 5.3
- CVE-2026-114061: SvelteKit cross-site scripting in prerendered pagesmediumCVSS 4.7EPSS 0.2%
- devalue uneval sparse-array CPU amplificationmediumCVSS 4
- devalue quadratic expansion in uneval with repeated primitivesmediumCVSS 4
- devalue sparse arrays excessive memory allocation in unevalmediumCVSS 4
- devalue ArrayBuffer allocation bypass via custom reviverhighCVSS 4
- devalue stringifyAsync unhandled promise rejectionmediumCVSS 4
- devalue library __proto__ bypass via malformed null-prototype keysmediumCVSS 4
- CVE-2026-92708: Svelte devalue memory disclosure in Node Buffer serializationhighCVSS 7.5EPSS 0.7%
- CVE-2026-82261: SvelteKit CPU exhaustion in remote form deserializationhighCVSS 7.5EPSS 0.5%
- CVE-2026-82260: SvelteKit memory exhaustion in remote form deserializationhighCVSS 7.5EPSS 0.5%
- CVE-2026-82259: SvelteKit deserialization expansion in form remote functionhighCVSS 7.5EPSS 0.5%
- CVE-2026-82258: SvelteJS Kit query.batch cross-talk vulnerabilitymediumCVSS 4.8EPSS 0.2%
- CVE-2026-82257: SvelteKit prototype pollution in file input deletionmediumCVSS 4.3EPSS 0.4%
- CVE-2026-82256: SvelteKit unhandled promise rejection in form payload handlingmediumCVSS 5.3EPSS 0.4%
- CVE-2026-66062: Svelte SvelteKit ReDoS in Accept header content negotiationmediumCVSS 5.3EPSS 0.5%
- CVE-2026-40074: Svelte SvelteKit denial of service in redirect functionhighCVSS 7.5EPSS 0.6%
- CVE-2026-40073: Svelte SvelteKit body size limit bypass in adapter-nodehighCVSS 7.5EPSS 1.0%
- CVE-2026-27118: Svelte adapter-vercel cache poisoning via ISR query parametermediumCVSS 4EPSS 0.2%
- CVE-2026-22803: SvelteKit memory amplification DoS in form deserializermediumCVSS 4EPSS 0.6%
- CVE-2025-67647: SvelteKit denial of service and SSRF in prerenderingmediumCVSS 4EPSS 0.5%
Most severe Svelte vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2023-29003: SvelteKit vulnerable to Cross-Site Request ForgeryhighCVSS 8.8EPSS 0.6%
- CVE-2023-29008: SvelteKit framework has Insufficient CSRF protection for CORS requestshighCVSS 8.8EPSS 0.4%
- CVE-2026-40073: Svelte SvelteKit body size limit bypass in adapter-nodehighCVSS 7.5EPSS 1.0%
- CVE-2024-23641: Sending a GET or HEAD request with a body crashes SvelteKithighCVSS 7.5EPSS 0.8%
- CVE-2026-92708: Svelte devalue memory disclosure in Node Buffer serializationhighCVSS 7.5EPSS 0.7%
- CVE-2026-40074: Svelte SvelteKit denial of service in redirect functionhighCVSS 7.5EPSS 0.6%
- CVE-2026-82259: SvelteKit deserialization expansion in form remote functionhighCVSS 7.5EPSS 0.5%
- CVE-2026-82261: SvelteKit CPU exhaustion in remote form deserializationhighCVSS 7.5EPSS 0.5%
- CVE-2026-82260: SvelteKit memory exhaustion in remote form deserializationhighCVSS 7.5EPSS 0.5%
- CVE-2026-123563: Devalue validation bypass in ArrayBuffer reviverhighCVSS 7.5
Vulnerabilities per week
6 vulnerabilities in the last four weeks, down 14% on the four before (7). The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 6 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 1 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 6 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 5 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 1 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many Svelte vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/vendors/svelte)<a href="https://junglewise.ai/threats/vendors/svelte"><img src="https://junglewise.ai/threats/vendors/svelte/badge.svg" alt="Svelte vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/vendors/svelte.json, and this page as text at https://junglewise.ai/threats/vendors/svelte.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Svelte vulnerabilities", https://junglewise.ai/threats/vendors/svelte, 9 November 2026.