{"affected":[{"defaultStatus":"unaffected","ecosystem":"npm","packageName":"devalue","product":"devalue","source":"CNA: VulnCheck","vendor":"sveltejs","versions":[{"lessThan":"5.9.3","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"5.9.3","versionType":"semver"}]},{"defaultStatus":"unaffected","ecosystem":"npm","packageName":"devalue","product":"devalue","source":"OSV GHSA-r9w8-h9r3-54w4","vendor":"","versions":[{"events":[{"introduced":"0"},{"fixed":"5.9.3"}],"lessThan":"5.9.3","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-123563","cwes":["CWE-789"],"description":"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 ArrayBuffer reviver to allocate massive ArrayBuffers, causing memory exhaustion and denial of service.","epss":{"date":"2026-11-12","percentile":0.31959,"score":0.00375},"exploits":[],"kev":null,"metrics":[{"score":8.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":7.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},{"score":8.7,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":7.5,"severity":"high","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}],"modifiedAt":1794538999929,"publishedAt":1794101883120,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/sveltejs/devalue/security/advisories/GHSA-r9w8-h9r3-54w4"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/devalue-before-5.9.3-typed-array-allocation-validation-bypass-via-parse"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/sveltejs/devalue/security/advisories/GHSA-r9w8-h9r3-54w4"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/devalue-before-5.9.3-typed-array-allocation-validation-bypass-via-parse"},{"source":"OSV / GitHub Security Advisories","tags":["advisory"],"url":"https://github.com/advisories/GHSA-r9w8-h9r3-54w4"},{"source":"OSV / GitHub Security Advisories","tags":["osv"],"url":"https://osv.dev/vulnerability/GHSA-r9w8-h9r3-54w4"}],"remediation":[{"kind":"fix","source":"OSV GHSA-r9w8-h9r3-54w4","text":"devalue (npm): OSV reports a fixed version 5.9.3. Check the advisory for supported release branches.","url":"https://github.com/advisories/GHSA-r9w8-h9r3-54w4"}],"revision":"ee8b90858ecdfbf4c3a8ad59f8f8e50ffc249c2366f070b48fc9091a2d013bd1","sources":[{"modifiedAt":1794538999929,"name":"CNA: VulnCheck","retrievedAt":1794542908928,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123563"},{"modifiedAt":1794519347960,"name":"NVD","retrievedAt":1794529127724,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123563"},{"modifiedAt":1794135372205,"name":"OSV / GitHub Security Advisories","retrievedAt":1794542909523,"url":"https://osv.dev/vulnerability/GHSA-r9w8-h9r3-54w4"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794542929740,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-123563"}],"ssvc":{"assessedAt":1794538990959,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Devalue before 5.9.3 Typed-Array Allocation Validation Bypass via parse","updatedAt":1794542929740}