darylldoyle svg-sanitizer up to 0.x Href Sanitizer.php isHrefSafeValue cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in darylldoyle svg-sanitizer up to 0.x. Impacted is the function isHrefSafeValue of the file Sanitizer.php of the component Href Handler. This manipulation causes cross site scripting. The identification of this vulnerability is CVE-2026-107380. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in darylldoyle svg-sanitizer up to 0.x. It has been declared as problematic. Affected by this vulnerability is the function isHrefSafeValue of the file Sanitizer.php of the component Href Handler. The manipulation with an unknown input leads to a cross site scripting 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. The summary by CVE is:

savg-sanitizer is a PHP SVG/XML sanitizer. Prior to 1.0.0, svg-sanitizer's isHrefSafeValue() validates an SVG href after XML DTD entity expansion, but saveXML() serializes the original entity reference after removing the DTD declaration. A crafted entity such as Tab can appear to the sanitizer as a safe fragment prefix while HTML5 Named Character Reference resolution during inline HTML rendering later converts the surviving reference to whitespace, exposing a javascript: URL. When an application embeds the sanitized SVG inline, a user who activates the link can cause script to execute in the embedding page's origin. This issue is fixed in version 1.0.0.

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-107380 since 10/07/2026. The exploitation appears to be easy. The attack can be launched remotely. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1059.007 according to MITRE ATT&CK.

By approaching the search of inurl:Sanitizer.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 1.0.0 eliminates this vulnerability.

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Productinfo

Vendor

• darylldoyle

Name

• svg-sanitizer

Version

• 0.x

Website

• Product: https://github.com/darylldoyle/svg-sanitizer/

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CPE 2.2info

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