CVE-2026-81887
- Source
- https://cve.org/CVERecord?id=CVE-2026-81887
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-81887.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-81887
- Aliases
- Published
- 2026-08-31T20:12:15.932Z
- Modified
- 2026-09-04T03:30:27.662527962Z
- Severity
-
- 5.1 (Medium) CVSS_V4 - 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 CVSS Calculator
- Summary
- Livewire DOM-based cross-site scripting during client-side state handling
- Details
-
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.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81887.json", "unresolved_ranges": [ { "source": "AFFECTED_FIELD", "extracted_events": [ { "introduced": "3.0.0-beta.1" }, { "fixed": "3.8.3" }, { "introduced": "4.0.0-beta.1" }, { "fixed": "4.3.4" } ] } ], "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-1321", "CWE-79" ] }- References
-
- https://github.com/livewire/livewire/releases/tag/v3.8.3
- https://github.com/livewire/livewire/releases/tag/v4.3.4
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/81xxx/CVE-2026-81887.json
- https://github.com/livewire/livewire/security/advisories/GHSA-g3hc-697w-wm82
- https://nvd.nist.gov/vuln/detail/CVE-2026-81887
- https://github.com/livewire/livewire/commit/11ebe646f7e81dde2d714815da8b3019d058561e
- https://github.com/livewire/livewire/pull/10467