apostrophecms sanitize-html up to 2.17.9 HTML Sanitizer HTML injection

Summaryinfo

A vulnerability described as problematic has been identified in apostrophecms sanitize-html up to 2.17.9. Affected is an unknown function of the component HTML Sanitizer. Executing a manipulation can lead to HTML injection. This vulnerability appears as CVE-2026-113657. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic was found in apostrophecms sanitize-html up to 2.17.9. This vulnerability affects an unknown code block of the component HTML Sanitizer. The manipulation with an unknown input leads to a html injection vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

ApostropheCMS is an open-source Node.js content management system, and sanitize-html provides a simple HTML sanitizer with a clear API. From sanitize-html 2.17.7 until 2.18.0, an application configuration that permits namespace-prefixed SVG animation elements and the relevant URL-targeting attributes can bypass the SMIL URL protection because prefixed tag names do not match the unprefixed animation-element check. The bypass can rewrite a link destination to an unsafe URI after the sanitized SVG is rendered, with script execution occurring when a user activates the affected link; the default sanitizer configuration is not unconditionally affected. This issue is fixed in sanitize-html 2.18.0.

The advisory is available at github.com. This vulnerability was named CVE-2026-113657 since 10/20/2026. The exploitation appears to be easy. The attack can be initiated remotely. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

Upgrading to version 2.18.0 eliminates this vulnerability.

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Productinfo

Vendor

• apostrophecms

Name

• sanitize-html

Version

• 2.17.0
• 2.17.1
• 2.17.2
• 2.17.3
• 2.17.4
• 2.17.5
• 2.17.6
• 2.17.7
• 2.17.8
• 2.17.9

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

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• 🔒
• 🔒

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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