svg SVGO up to 2.8.2/3.3.3/4.0.1 removeScripts cross site scripting

Summaryinfo

A vulnerability was found in svg SVGO up to 2.8.2/3.3.3/4.0.1. It has been rated as problematic. Affected by this issue is some unknown functionality of the component removeScripts. The manipulation leads to cross site scripting. This vulnerability is listed as CVE-2026-73650. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in svg SVGO up to 2.8.2/3.3.3/4.0.1. It has been rated as problematic. This issue affects an unknown function of the component removeScripts. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to 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. Impacted is integrity. The summary by CVE is:

SVGO, short for SVG Optimizer, is a Node.js library and command-line application for optimizing SVG files. From version 1.0.0 until versions 2.8.3, 3.3.4, and 4.0.2, the removeScripts plugin, named removeScriptElement in versions 1 through 3, can leave executable content in optimized SVGs because it does not remove namespaced or prefixed script elements such as <svg:script> and, in versions 3 and 4, matches JavaScript URIs case sensitively. Applications that process untrusted SVG input with this plugin enabled and serve the result can allow scripts to execute when another user opens the SVG, exposing local storage or cookies. This issue is fixed in versions 2.8.3, 3.3.4, and 4.0.2.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-73650 since 08/13/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 2.8.3, 3.3.4 or 4.0.2 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

• svg

Name

• SVGO

Version

• 2.8.0
• 2.8.1
• 2.8.2
• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3
• 4.0.0
• 4.0.1

Website

• Product: https://github.com/svg/svgo/

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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