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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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.
    (CVE-2026-65898)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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.
    (CVE-2026-65898)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
463069	Echo: dompurify: security update to 3.4.11	Tenable Cloud Security	Echo Local Security Checks	Local	medium
463069	Echo: dompurify: security update to 3.4.11	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
329653	Linux Distros Unpatched Vulnerability : CVE-2026-65898	Nessus	Misc.	Local	medium
443530	SCA: security update for dompurify (GHSA-cmwh-pvxp-8882)	Tenable Cloud Security	SCA Checks	Local	medium
443530	SCA: security update for dompurify (GHSA-cmwh-pvxp-8882)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-65898

medium

Tenable Plugins

medium

medium

medium

medium

medium