Livewire DOM-based cross-site scripting during client-side state handling
Impact
In Livewire v3 (≤ 3.8.2) and v4 (≤ 4.3.3), a vulnerability allows unauthenticated attackers to execute arbitrary JavaScript in the origin of an affected application in specific scenarios. The issue stems from how certain client-side component state is handled. This vulnerability does not affect prior major versions. Exploitation requires user interaction, but does not require authentication or prior access to the application. The issue does not bypass server-side authorisation and grants an attacker no privileges beyond those the affected user already holds.
Patches
This issue has been patched in Livewire v3.8.3 and v4.3.4. All users are strongly encouraged to upgrade to these versions or later as soon as possible.
Workarounds
There is no known workaround at this time. Users are strongly advised to upgrade to a patched version immediately.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Paquete de Composer | livewire/livewire | >= 3.0.0-beta.1, < 3.8.3, >= 4.0.0-beta.1, < 4.3.4 | 3.8.3, 4.3.4 |
Referencias
- 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/pull/10467
- https://github.com/livewire/livewire/commit/11ebe646f7e81dde2d714815da8b3019d058561e
- https://github.com/livewire/livewire
- https://github.com/livewire/livewire/releases/tag/v3.8.3
- https://github.com/livewire/livewire/releases/tag/v4.3.4
- Vector CVSS
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- Debilidad (CWE)
CWE-1321, CWE-79- Plataforma
- Composer
- Paquete
livewire/livewire- Publicada
- 02.09.2026
- Actualizado
- 11.10.2026 10:22
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-g3hc-697w-wm82 - CC BY 4.0
Historial de vulnerabilidades: livewire/livewire
Todas las vulnerabilidades publicadas de este paquete (Paquete de Composer), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 5
- Primera → última
- 03.2024 09.2026
- Sin corrección
- 0
- Explotada en ataques
- 1
Distribución por gravedad
- Crítica 1
- Alta 1
- Media 3
Divulgaciones por año
- 2024: 3
- 2025: 1
- 2026: 1
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Livewire DOM-based cross-site scripting during client-side state handling esta entrada
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