DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions 3.0.1 through 3.3.3 are vulnerable to a prototype pollution-based XSS bypass. When an application uses `DOMPurify.sanitize()` with the default configuration (no `CUSTOM_ELEMENT_HANDLING` option), a prior prototype pollution gadget can inject permissive `tagNameCheck` and `attributeNameCheck` regex values into `Object.prototype`, causing DOMPurify to allow arbitrary custom elements with arbitrary attributes — including event handlers — through sanitization. Version 3.4.0 fixes the issue.

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

  - DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions 3.0.1 through
    3.3.3 are vulnerable to a prototype pollution-based XSS bypass. When an application uses
    `DOMPurify.sanitize()` with the default configuration (no `CUSTOM_ELEMENT_HANDLING` option), a prior
    prototype pollution gadget can inject permissive `tagNameCheck` and `attributeNameCheck` regex values into
    `Object.prototype`, causing DOMPurify to allow arbitrary custom elements with arbitrary attributes —
    including event handlers — through sanitization. Version 3.4.0 fixes the issue. (CVE-2026-41238)

The version of Primavera P6 Enterprise Project Portfolio Management installed on the remote host is affected by a vulnerability as referenced in the August 2026 CSPU advisory.

  - Vulnerability in the Primavera P6 Enterprise Project Portfolio Management product of Oracle Construction     and Engineering (component: Web Access (DOMPurify)). Supported versions that are affected are     21.12.0.0-21.12.21.8, 22.12.0.0-22.12.21.3, 23.12.0.0-23.12.19.0, 24.12.0.0-24.12.15.0 and     25.12.0.0-25.12.6.0. Easily exploitable vulnerability allows unauthenticated attacker with network     access via HTTP to compromise Primavera P6 Enterprise Project Portfolio Management. Successful attacks     require human interaction from a person other than the attacker and while the vulnerability is in     Primavera P6 Enterprise Project Portfolio Management, attacks may significantly impact additional     products (scope change). Successful attacks of this vulnerability can result in unauthorized access to     critical data or complete access to all Primavera P6 Enterprise Project Portfolio Management accessible     data as well as unauthorized update, insert or delete access to some of Primavera P6 Enterprise Project     Portfolio Management accessible data. (CVE-2026-41240)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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

  - DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Versions 3.0.1 through     3.3.3 are vulnerable to a prototype pollution-based XSS bypass. When an application uses     `DOMPurify.sanitize()` with the default configuration (no `CUSTOM_ELEMENT_HANDLING` option), a prior     prototype pollution gadget can inject permissive `tagNameCheck` and `attributeNameCheck` regex values into     `Object.prototype`, causing DOMPurify to allow arbitrary custom elements with arbitrary attributes     including event handlers  through sanitization. Version 3.4.0 fixes the issue. (CVE-2026-41238)

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

ID	Name	Product	Family	Type	Severity
459658	Echo: dompurify: security update to 3.4.0	Tenable Cloud Security	Echo Local Security Checks	Local	medium
459658	Echo: dompurify: security update to 3.4.0	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	medium
338746	Oracle Primavera P6 Enterprise Project Portfolio Management (August 2026 CSPU)	Nessus	CGI abuses	Remote	medium
310042	Linux Distros Unpatched Vulnerability : CVE-2026-41238	Nessus	Misc.	Local	medium
440719	SCA: security update for dompurify (GHSA-v9jr-rg53-9pgp)	Tenable Cloud Security	SCA Checks	Local	medium
440719	SCA: security update for dompurify (GHSA-v9jr-rg53-9pgp)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium

Detections

Analytics

CVE-2026-41238

medium

Tenable Plugins

medium

medium

medium

medium

medium

medium