{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-123563", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-11-06T00:50:45.483Z", "datePublished": "2026-11-08T01:38:03.120Z", "dateUpdated": "2026-11-08T01:38:03.120Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-11-08T01:38:03.120Z" }, "datePublic": "2026-09-18T00:00:00.000Z", "title": "Devalue before 5.9.3 Typed-Array Allocation Validation Bypass via parse", "descriptions": [ { "lang": "en", "value": "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." } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "description": "Memory Allocation with Excessive Size Value", "cweId": "CWE-789", "type": "CWE" } ] } ], "affected": [ { "vendor": "sveltejs", "product": "devalue", "defaultStatus": "unaffected", "packageURL": "pkg:npm/devalue", "versions": [ { "version": "0", "status": "affected", "versionType": "semver", "lessThan": "5.9.3" }, { "version": "5.9.3", "status": "unaffected", "versionType": "semver" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:svelte:devalue:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.9.3" } ] } ] } ], "metrics": [ { "cvssV4_0": { "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 8.7, "baseSeverity": "HIGH", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "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", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED" }, "format": "CVSS" }, { "cvssV3_1": { "attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1" }, "format": "CVSS" } ], "references": [ { "url": "https://github.com/sveltejs/devalue/security/advisories/GHSA-r9w8-h9r3-54w4", "tags": [ "vendor-advisory" ], "name": "GitHub Security Advisory (GHSA-r9w8-h9r3-54w4)" }, { "name": "VulnCheck Advisory: Devalue before 5.9.3 Typed-Array Allocation Validation Bypass via parse", "tags": [ "third-party-advisory" ], "url": "https://www.vulncheck.com/advisories/devalue-before-5.9.3-typed-array-allocation-validation-bypass-via-parse" } ], "credits": [ { "lang": "en", "value": "elliott-with-the-longest-name-on-github", "type": "remediation developer" } ], "x_generator": { "engine": "vulncheck-endgame" } } } }