svg SVGO up to 2.8.3/3.3.4/4.0.x removeScripts plugins/removeScripts.js cross site scripting

Summaryinfo

A vulnerability classified as problematic has been found in svg SVGO up to 2.8.3/3.3.4/4.0.x. The affected element is an unknown function of the file plugins/removeScripts.js of the component removeScripts. The manipulation leads to cross site scripting. This vulnerability is referenced as CVE-2026-84369. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in svg SVGO up to 2.8.3/3.3.4/4.0.x. This issue affects some unknown processing of the file plugins/removeScripts.js 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 2.8.4, 3.3.5, and 4.1.0, the opt-in removeScripts plugin, named removeScriptElement in versions 2 and 3 and implemented in plugins/removeScripts.js, removes SVG and XHTML script elements but does not inspect executable HTML content inside SVG foreignObject elements. Event-handler attributes such as onload and onbeforetoggle, srcdoc documents, and executable URLs in the action, data, formaction, href, and src attributes can remain in attacker-controlled SVG input. When an application uses the plugin as its only protection and serves the optimized SVG in an active browser context, the payload can execute script in the viewer's origin, expose data, modify content, or perform actions as the victim. This issue is fixed in versions 2.8.4, 3.3.5, and 4.1.0.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-84369 since 09/01/2026. 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. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading to version 2.8.4, 3.3.5 or 4.1.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-69651). 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
• 2.8.3
• 3.3.0
• 3.3.1
• 3.3.2
• 3.3.3
• 3.3.4
• 4.0

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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