Descripción
DOMPurify before 3.4.11 fails to clone the ALLOWED_ATTR allowlist when setConfig() is used with an uponSanitizeAttribute hook, allowing the hook to permanently mutate the shared allowlist. Attackers can register a hook that conditionally allows dangerous attributes like onerror for trusted elements, then submit untrusted content that inherits the polluted allowlist and executes event handlers as stored XSS.
CVSS 7.2EPSS 0.167%Riesgo 0.73
Ver fuente- Publicación
- 2026-07-23 14:18:04
- Versiones afectadas
- <3.4.11
- Tipo
- Librería
- Última modificación
- 2026-07-28 15:54:05
- Vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N