{"id":"CVE-2025-67647","state":"PUBLISHED","title":"SvelteKit Denial of service and possible SSRF when using prerendering","description":"SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.49.5, SvelteKit is vulnerable to a server side request forgery (SSRF) and denial of service (DoS) under certain conditions. From 2.44.0 through 2.49.4, the vulnerability results in a DoS when your app has at least one prerendered route (export const prerender = true). From 2.19.0 through 2.49.4, the vulnerability results in a DoS when your app has at least one prerendered route and you are using adapter-node without a configured ORIGIN environment variable, and you are not using a reverse proxy that implements Host header validation. This vulnerability is fixed in 2.49.5.","publishedAt":"2026-01-15T18:33:25.295Z","updatedAt":"2026-01-15T18:58:01.975Z","severity":{"score":8.4,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:H/SC:L/SI:L/SA:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["sveltejs kit"],"affected":[{"vendor":"sveltejs","product":"kit","versions":[{"version":">= 2.19.0, < 2.49.5","status":"affected"}]}],"references":["https://github.com/sveltejs/kit/security/advisories/GHSA-j62c-4x62-9r35","https://github.com/sveltejs/kit/commit/d9ae9b00b14f5574d109f3fd548f960594346226"],"weaknesses":["CWE-248","CWE-918"],"ingestedAt":"2026-10-29T20:09:56.034Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/67xxx/CVE-2025-67647.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-67647","state":"PUBLISHED","datePublished":"2026-01-15T18:33:25.295Z","dateUpdated":"2026-01-15T18:58:01.975Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2025-12-09T18:36:41.331Z"},"containers":{"cna":{"title":"SvelteKit Denial of service and possible SSRF when using prerendering","descriptions":[{"lang":"en","value":"SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.49.5, SvelteKit is vulnerable to a server side request forgery (SSRF) and denial of service (DoS) under certain conditions. From 2.44.0 through 2.49.4, the vulnerability results in a DoS when your app has at least one prerendered route (export const prerender = true). From 2.19.0 through 2.49.4, the vulnerability results in a DoS when your app has at least one prerendered route and you are using adapter-node without a configured ORIGIN environment variable, and you are not using a reverse proxy that implements Host header validation. This vulnerability is fixed in 2.49.5."}],"affected":[{"vendor":"sveltejs","product":"kit","versions":[{"version":">= 2.19.0, < 2.49.5","status":"affected"}]}],"references":[{"url":"https://github.com/sveltejs/kit/security/advisories/GHSA-j62c-4x62-9r35","name":"https://github.com/sveltejs/kit/security/advisories/GHSA-j62c-4x62-9r35","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/sveltejs/kit/commit/d9ae9b00b14f5574d109f3fd548f960594346226","name":"https://github.com/sveltejs/kit/commit/d9ae9b00b14f5574d109f3fd548f960594346226","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":8.4,"baseSeverity":"HIGH","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:H/SC:L/SI:L/SA:N","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-248","lang":"en","description":"CWE-248: Uncaught Exception","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-918","lang":"en","description":"CWE-918: Server-Side Request Forgery (SSRF)","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-01-15T18:33:25.295Z"},"source":{"advisory":"GHSA-j62c-4x62-9r35","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-01-15T18:57:32.614460Z","id":"CVE-2025-67647","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-01-15T18:58:01.975Z"}}]}}}