CVE-2026-65898

A flaw was found in DOMPurify. When the setConfig function is used with an uponSanitizeAttribute hook, the ALLOWEDATTR allowlist is not properly cloned. This allows an attacker to register a hook that can permanently modify the shared allowlist, enabling the conditional allowance of dangerous...

UBUNTU-CVE-2026-65898

DOMPurify before 3.4.11 fails to clone the ALLOWEDATTR 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,...

CVE-2026-65898: Improper Neutralization of Input During Web Page Generation

DOMPurify before 3.4.11 fails to clone the ALLOWEDATTR 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,...