{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-73088", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-10T19:37:41.445Z", "datePublished": "2026-08-11T17:00:05.869Z", "dateUpdated": "2026-08-11T17:00:05.869Z"}, "containers": {"cna": {"title": "Browserslist: Uncaught crash / prototype write via untrusted browserslist-stats.json custom stats (normalizeStats)", "problemTypes": [{"descriptions": [{"cweId": "CWE-1321", "lang": "en", "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-248", "lang": "en", "description": "CWE-248: Uncaught Exception", "type": "CWE"}]}], "metrics": [{"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"}}], "references": [{"name": "https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g"}, {"name": "https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51", "tags": ["x_refsource_MISC"], "url": "https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51"}, {"name": "https://github.com/browserslist/browserslist/releases/tag/4.28.7", "tags": ["x_refsource_MISC"], "url": "https://github.com/browserslist/browserslist/releases/tag/4.28.7"}], "affected": [{"vendor": "browserslist", "product": "browserslist", "versions": [{"version": "< 4.28.7", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-11T17:00:05.869Z"}, "descriptions": [{"lang": "en", "value": "Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, normalizeStats() in node.js, reached unconditionally through getStat() and loadStat() on every browserslist() call, processes untrusted browserslist-stats.json, opts.stats, and CLI --stats data with an unguarded for...in loop and plain-object bracket access and assignment, allowing inherited Object.prototype keys including __proto__, toString, valueOf, constructor, hasOwnProperty, and isPrototypeOf to cause an uncaught TypeError or modify the prototype of the returned normalized object. This issue is fixed in version 4.28.7."}], "source": {"advisory": "GHSA-73wf-gq98-2v4g", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "browserslist", "vendor": "browserslist", "versions": [{"status": "affected", "version": "< 4.28.7"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Browserslist is a configuration tool for sharing target browsers and Node.js versions between front-end tools. Prior to 4.28.7, normalizeStats() in node.js, reached unconditionally through getStat() and loadStat() on every browserslist() call, processes untrusted browserslist-stats.json, opts.stats, and CLI --stats data with an unguarded for...in loop and plain-object bracket access and assignment, allowing inherited Object.prototype keys including __proto__, toString, valueOf, constructor, hasOwnProperty, and isPrototypeOf to cause an uncaught TypeError or modify the prototype of the returned normalized object. This issue is fixed in version 4.28.7."}], "id": "CVE-2026-73088", "lastModified": "2026-08-11T17:19:16.977", "metrics": {"cvssMetricV31": [{"cvssData": {"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"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-11T17:19:16.977", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/browserslist/browserslist/commit/f9914ad9effc865ccc27d816255625890b31ca51"}, {"source": "security-advisories@github.com", "url": "https://github.com/browserslist/browserslist/releases/tag/4.28.7"}, {"source": "security-advisories@github.com", "url": "https://github.com/browserslist/browserslist/security/advisories/GHSA-73wf-gq98-2v4g"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-248"}, {"lang": "en", "value": "CWE-1321"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{}