CVE-2026-73650: SVGO: removeScripts plugin leaves some executable scripts intact

Severity: high (CVSS 8.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-13 · updated 2026-09-18
Weakness: CWE-79

Description

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.

Affected products

Npm Svgo: from 1.0.0 before 2.8.3; from 3.0.0 before 3.3.4; from 4.0.0 before 4.0.2 — fixed in 2.8.3, 3.3.4, 4.0.2
svgo: from 1.0.0, < 2.8.3; from 3.0.0, < 3.3.4; from 4.0.0, < 4.0.2

How to fix

Upgrade to a fixed version: Npm Svgo 2.8.3, 3.3.4, 4.0.2. Check the vendor advisory for mitigations.

References

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