{"id":"CVE-2026-123563","title":"Devalue before 5.9.3 Typed-Array Allocation Validation Bypass via parse","summary":"Devalue before 5.9.3 contains a validation bypass vulnerability that allows custom ArrayBuffer revivers to skip typed-array allocation checks in the parse function. Attackers can supply very small crafted input processed by a malformed A…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-789"],"vendor":"sveltejs","product":"devalue","affected":["devalue < 5.9.3"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:38:03.120Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123563","references":[{"url":"https://github.com/sveltejs/devalue/security/advisories/GHSA-r9w8-h9r3-54w4","label":"GitHub Security Advisory (GHSA-r9w8-h9r3-54w4)"},{"url":"https://www.vulncheck.com/advisories/devalue-before-5.9.3-typed-array-allocation-validation-bypass-via-parse","label":"VulnCheck Advisory: Devalue before 5.9.3 Typed-Array Allocation Validation Bypass via parse"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.661Z","slug":"CVE-2026-123563","body":"## Overview\n\nDevalue before 5.9.3 contains a validation bypass vulnerability that allows custom ArrayBuffer revivers to skip typed-array allocation checks in the parse function. Attackers can supply very small crafted input processed by a malformed ArrayBuffer reviver to allocate massive ArrayBuffers, causing memory exhaustion and denial of service.\n\n## Affected\n\n- `devalue < 5.9.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}