{"id":"CVE-2026-22803","summary":"SvelteKit has a memory amplification DoS in Remote Functions binary form deserializer","details":"SvelteKit is a framework for rapidly developing robust, performant web applications using Svelte. From 2.49.0 to 2.49.4, the experimental form remote function uses a binary data format containing a representation of submitted form data. A specially-crafted payload can cause the server to allocate a large amount of memory, causing DoS via memory exhaustion. This vulnerability is fixed in 2.49.5.","aliases":["GHSA-j2f3-wq62-6q46"],"modified":"2026-08-12T03:51:42.215667711Z","published":"2026-01-15T18:37:57.831Z","database_specific":{"cwe_ids":["CWE-789"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22803.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/sveltejs/kit/releases/tag/@sveltejs%2Fadapter-node@5.5.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/22xxx/CVE-2026-22803.json"},{"type":"ADVISORY","url":"https://github.com/sveltejs/kit/security/advisories/GHSA-j2f3-wq62-6q46"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-22803"},{"type":"FIX","url":"https://github.com/sveltejs/kit/commit/8ed8155215b9a74012fecffb942ad9a793b274e5"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/sveltejs/kit","events":[{"introduced":"ab3784911accefd8d3bc292a80d8e3b825528fd3"},{"fixed":"80ffb53382e397a8fc83e6b63d2675eeabb427bd"},{"fixed":"8ed8155215b9a74012fecffb942ad9a793b274e5"}],"database_specific":{"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:svelte:kit:*:*:*:*:*:node.js:*:*","extracted_events":[{"introduced":"2.49.0"},{"fixed":"2.49.5"}]}}],"versions":["@sveltejs/adapter-node@5.5.0","@sveltejs/kit@2.49.4","@sveltejs/kit@2.49.3","@sveltejs/adapter-vercel@6.3.0","@sveltejs/kit@2.49.2","@sveltejs/kit@2.49.1","@sveltejs/package@2.5.7","@sveltejs/enhanced-img@0.9.2","@sveltejs/adapter-vercel@6.2.0","@sveltejs/enhanced-img@0.9.1","@sveltejs/kit@2.49.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-22803.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}