{"api_version":"1","generated_at":"2026-08-11T22:23:12+00:00","cve":"CVE-2026-73088","urls":{"html":"https://cve.report/CVE-2026-73088","api":"https://cve.report/api/cve/CVE-2026-73088.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-73088","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-73088"},"summary":{"title":"Browserslist: Uncaught crash / prototype write via untrusted browserslist-stats.json custom stats (normalizeStats)","description":"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. 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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."}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1321","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-248","description":"CWE-248: Uncaught Exception","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-11T17:00:05.869Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"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"}],"source":{"advisory":"GHSA-73wf-gq98-2v4g","discovery":"UNKNOWN"},"title":"Browserslist: Uncaught crash / prototype write via untrusted browserslist-stats.json custom stats (normalizeStats)"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-73088","datePublished":"2026-08-11T17:00:05.869Z","dateReserved":"2026-08-10T19:37:41.445Z","dateUpdated":"2026-08-11T17:00:05.869Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-11 17:19:16","lastModifiedDate":"2026-08-11 17:19:16","problem_types":["CWE-248","CWE-1321","CWE-1321 CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","CWE-248 CWE-248: Uncaught Exception"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"73088","Ordinal":"1","Title":"Browserslist: Uncaught crash / prototype write via untrusted bro","CVE":"CVE-2026-73088","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"73088","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Browserslist: Uncaught crash / prototype write via untrusted bro"}]}}}