{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-82257", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-28T10:39:30.356Z", "datePublished": "2026-08-28T10:49:41.355Z", "dateUpdated": "2026-08-28T10:49:41.355Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-28T10:49:41.355Z"}, "datePublic": "2026-07-02T00:00:00.000Z", "title": "SvelteKit before 2.69.1 Prototype Pollution via File Input", "descriptions": [{"lang": "en", "value": "SvelteKit versions before 2.69.1 contain a prototype pollution vulnerability in remote form functions with file input fields that accept arbitrary user-controlled path names. Attackers can manipulate the deletion path to remove methods on the prototype, potentially disabling application functionality."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')", "cweId": "CWE-1321", "type": "CWE"}]}], "affected": [{"vendor": "sveltejs", "product": "kit", "defaultStatus": "unaffected", "packageURL": "pkg:npm/sveltejs/kit", "versions": [{"version": "0", "status": "affected", "versionType": "semver", "lessThan": "2.69.1"}, {"version": "2.69.1", "status": "unaffected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:svelte:kit:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.69.1"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM"}}], "references": [{"url": "https://github.com/sveltejs/kit/security/advisories/GHSA-866w-xmhq-wj7x", "tags": ["vendor-advisory"], "name": "GitHub Security Advisory (GHSA-866w-xmhq-wj7x)"}, {"name": "VulnCheck Advisory: SvelteKit before 2.69.1 Prototype Pollution via File Input", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/sveltekit-before-2.69.1-prototype-pollution-via-file-input"}], "credits": [{"lang": "en", "value": "iaohkut-from-NightWolf-Team", "type": "reporter"}, {"lang": "en", "value": "dummdidumm", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}}}

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