{"id":"CVE-2026-123569","published":"2026-11-08T02:16:49.673","lastModified":"2026-11-10T18:17:25.973","description":"The devalue package for npm before 5.6.3 can consume excessive CPU and memory when serializing sparse arrays with uneval or stringify. An attacker who manages to get a sparse array created on the server, which mainstream wire formats do not allow, and serialized there can cause a denial of service.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-770"],"vendors":[],"products":[],"references":[{"url":"https://github.com/sveltejs/devalue/security/advisories/GHSA-33hq-fvwr-56pm","tags":[]},{"url":"https://www.vulncheck.com/advisories/devalue-before-5.6.3-denial-of-service-via-sparse-array-serialization","tags":[]}],"exploitRefs":[{"url":"https://github.com/sveltejs/devalue/security/advisories/GHSA-33hq-fvwr-56pm","tags":[]}],"hasPoc":true,"ai":null}