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CVE-2026-81887

🗓️ 31 Aug 2026 20:12:15Reported by GitHub_MType 
cve
 cve
🔗 web.nvd.nist.gov👁 99 Views🌐 WEB

DOM-based XSS in Livewire 3.0.0-beta.1 to 4.3.4 via __proto__ in dot-notated query parser.

Related
Detection
Affected
Refs
Paths
Vulners
Node
OR
laravellivewireRange3.0.0-beta.1–3.8.3
laravellivewireRange4.0.0-beta.1–4.3.4
[
  {
    "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"
      }
    ]
  }
]
ParameterPositionPathDescriptionCWE
__proto__query paramfromQueryString()The dot-notated query-string parser in js/plugins/history/index.js accepts __proto__, constructor, and prototype path segments, allowing an attacker to inject inherited objects into the client-side state.CWE-1321, CWE-79
constructorquery paramfromQueryString()The dot-notated query-string parser in js/plugins/history/index.js accepts __proto__, constructor, and prototype path segments, allowing an attacker to inject inherited objects into the client-side state.CWE-1321, CWE-79
prototypequery paramfromQueryString()The dot-notated query-string parser in js/plugins/history/index.js accepts __proto__, constructor, and prototype path segments, allowing an attacker to inject inherited objects into the client-side state.CWE-1321, CWE-79

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09 Sep 2026 21:09Current
6Medium risk
Vulners AI Score6
CVSS 45.1
EPSS0.00682
SSVC
99