{"id":"CVE-2026-123564","published":"2026-11-08T02:16:48.877","lastModified":"2026-11-08T02:16:48.877","description":"Sveltejs devalue from 1.0.0 before 5.9.3 contains a memory exhaustion flaw in uneval, whose generated code for sparse arrays allocates memory proportional to the array's declared length when evaluated. Attackers who can influence a very large sparse array serialized by an application can exhaust memory in the browser or runtime evaluating the output.","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-wf3x-273g-mvxv","tags":[]},{"url":"https://www.vulncheck.com/advisories/sveltejs-devalue-before-5.9.3-memory-exhaustion-via-uneval-sparse-arrays","tags":[]}],"exploitRefs":[{"url":"https://github.com/sveltejs/devalue/security/advisories/GHSA-wf3x-273g-mvxv","tags":[]}],"hasPoc":true,"ai":null}