{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-66062","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-07-23T23:25:28.896Z","datePublished":"2026-08-07T16:49:43.853Z","dateUpdated":"2026-08-07T21:02:12.997Z"},"containers":{"cna":{"title":"SvelteKit: ReDoS (O(n^2)) in content negotiation — unauthenticated DoS via the Accept header","problemTypes":[{"descriptions":[{"cweId":"CWE-1333","lang":"en","description":"CWE-1333: Inefficient Regular Expression Complexity","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}}],"references":[{"name":"https://github.com/sveltejs/kit/security/advisories/GHSA-29g2-3rmr-qm68","tags":["x_refsource_CONFIRM"],"url":"https://github.com/sveltejs/kit/security/advisories/GHSA-29g2-3rmr-qm68"},{"name":"https://github.com/sveltejs/kit/commit/82712fc02c24b1dcf5b25d7a52129cd8455f04f5","tags":["x_refsource_MISC"],"url":"https://github.com/sveltejs/kit/commit/82712fc02c24b1dcf5b25d7a52129cd8455f04f5"},{"name":"https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.70.2","tags":["x_refsource_MISC"],"url":"https://github.com/sveltejs/kit/releases/tag/@sveltejs/kit@2.70.2"}],"affected":[{"vendor":"sveltejs","product":"kit","versions":[{"version":"< 2.70.2","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-07T16:49:43.853Z"},"descriptions":[{"lang":"en","value":"SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. Prior to 2.70.2, the content negotiation header parser used by SvelteKit's request handling (for headers such as Accept) uses a regular expression vulnerable to quadratic backtracking, so a maliciously crafted header value can cause excessive CPU consumption and degrade or deny service. Version 2.70.2 fixes the issue."}],"source":{"advisory":"GHSA-29g2-3rmr-qm68","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-07T20:58:04.458547Z","id":"CVE-2026-66062","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-07T21:02:12.997Z"}}]}}