{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-81887", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-08-27T17:48:42.123Z", "datePublished": "2026-08-31T20:12:15.932Z", "dateUpdated": "2026-08-31T20:12:15.932Z"}, "containers": {"cna": {"title": "Livewire DOM-based cross-site scripting during client-side state handling", "problemTypes": [{"descriptions": [{"cweId": "CWE-79", "lang": "en", "description": "CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')", "type": "CWE"}]}, {"descriptions": [{"cweId": "CWE-1321", "lang": "en", "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "NONE", "baseScore": 5.1, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/livewire/livewire/security/advisories/GHSA-g3hc-697w-wm82", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/livewire/livewire/security/advisories/GHSA-g3hc-697w-wm82"}, {"name": "https://github.com/livewire/livewire/pull/10467", "tags": ["x_refsource_MISC"], "url": "https://github.com/livewire/livewire/pull/10467"}, {"name": "https://github.com/livewire/livewire/commit/11ebe646f7e81dde2d714815da8b3019d058561e", "tags": ["x_refsource_MISC"], "url": "https://github.com/livewire/livewire/commit/11ebe646f7e81dde2d714815da8b3019d058561e"}, {"name": "https://github.com/livewire/livewire/releases/tag/v3.8.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/livewire/livewire/releases/tag/v3.8.3"}, {"name": "https://github.com/livewire/livewire/releases/tag/v4.3.4", "tags": ["x_refsource_MISC"], "url": "https://github.com/livewire/livewire/releases/tag/v4.3.4"}], "affected": [{"vendor": "livewire", "product": "livewire", "versions": [{"version": ">= 3.0.0-beta.1, < 3.8.3", "status": "affected"}, {"version": ">= 4.0.0-beta.1, < 4.3.4", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-31T20:12:15.932Z"}, "descriptions": [{"lang": "en", "value": "Livewire is a full-stack framework for Laravel. From 3.0.0-beta.1 until 3.8.3 and 4.3.4, the dot-notated query-string parser in js/plugins/history/index.js, including fromQueryString() and insertDotNotatedValueIntoData(), accepts the __proto__, constructor, and prototype path segments and creates inherited objects. Client-side state handlers then access effects.html, effects.js, effects.xjs, and effects.scripts without Object.prototype.hasOwnProperty.call(), allowing inherited attacker-controlled state to be treated as trusted effects. An unauthenticated attacker can craft a URL that, when opened by a user, executes arbitrary JavaScript in the affected application's origin. Exploitation requires user interaction and does not bypass server-side authorization or grant privileges beyond the affected user. This issue is fixed in versions 3.8.3 and 4.3.4."}], "source": {"advisory": "GHSA-g3hc-697w-wm82", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "livewire", "vendor": "livewire", "versions": [{"status": "affected", "version": ">= 3.0.0-beta.1, < 3.8.3"}, {"status": "affected", "version": ">= 4.0.0-beta.1, < 4.3.4"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Livewire is a full-stack framework for Laravel. From 3.0.0-beta.1 until 3.8.3 and 4.3.4, the dot-notated query-string parser in js/plugins/history/index.js, including fromQueryString() and insertDotNotatedValueIntoData(), accepts the __proto__, constructor, and prototype path segments and creates inherited objects. Client-side state handlers then access effects.html, effects.js, effects.xjs, and effects.scripts without Object.prototype.hasOwnProperty.call(), allowing inherited attacker-controlled state to be treated as trusted effects. An unauthenticated attacker can craft a URL that, when opened by a user, executes arbitrary JavaScript in the affected application's origin. Exploitation requires user interaction and does not bypass server-side authorization or grant privileges beyond the affected user. This issue is fixed in versions 3.8.3 and 4.3.4."}], "id": "CVE-2026-81887", "lastModified": "2026-08-31T21:17:52.157", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.1, "baseSeverity": "MEDIUM", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/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", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-08-31T21:17:52.157", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/livewire/livewire/commit/11ebe646f7e81dde2d714815da8b3019d058561e"}, {"source": "security-advisories@github.com", "url": "https://github.com/livewire/livewire/pull/10467"}, {"source": "security-advisories@github.com", "url": "https://github.com/livewire/livewire/releases/tag/v3.8.3"}, {"source": "security-advisories@github.com", "url": "https://github.com/livewire/livewire/releases/tag/v4.3.4"}, {"source": "security-advisories@github.com", "url": "https://github.com/livewire/livewire/security/advisories/GHSA-g3hc-697w-wm82"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}, {"lang": "en", "value": "CWE-1321"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}