SVGO: removeScripts allows executable links through namespace and control-character bypasses
Summary
| CVE | CVE-2026-84370 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-01 21:18:48 UTC |
| Updated | 2026-09-01 21:18:48 UTC |
| 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 2.8.4, 3.3.5, and 4.1.0, the opt-in removeScripts plugin, named removeScriptElement in versions 2 and 3, incompletely filters executable links in plugins/removeScripts.js and lib/svgo/tools.js. The plugin does not recognize namespace-prefixed SVG anchor elements such as svg:a with href or namespaced *:href values, and it does not remove ASCII tab, line-feed, or carriage-return characters before checking URL schemes. Browsers remove those characters before parsing a scheme, allowing an executable link to pass the plugin's check. When an application processes attacker-controlled SVG input and serves the result in an active browser context, a victim who activates the surviving link can execute script in the SVG'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. |
Risk And Classification
Primary CVSS: v3.1 8.2 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Problem Types: CWE-79 | CWE-184 | CWE-79 CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | CWE-184 CWE-184: Incomplete List of Disallowed Inputs
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 8.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N |
| 3.1 | CNA | DECLARED | 8.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
RequiredScope
ChangedConfidentiality
HighIntegrity
LowAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/svg/svgo/commit/0557385564a5c6c11d76cd934a6cff94451e532c | [email protected] | github.com | |
| github.com/svg/svgo/pull/2268 | [email protected] | github.com | |
| github.com/svg/svgo/pull/2272 | [email protected] | github.com | |
| github.com/svg/svgo/releases/tag/v4.1.0 | [email protected] | github.com | |
| github.com/svg/svgo/pull/2269 | [email protected] | github.com | |
| github.com/svg/svgo/commit/994a9f00d79ddec68ce19a1ce9eb8ca08d747e4f | [email protected] | github.com | |
| github.com/svg/svgo/commit/3db3ef33e409a0bc0fdaf255e46c908b00e93bc2 | [email protected] | github.com | |
| github.com/svg/svgo/releases/tag/v3.3.5 | [email protected] | github.com | |
| github.com/svg/svgo/security/advisories/GHSA-w27v-7q3p-w38r | [email protected] | github.com | |
| github.com/svg/svgo/releases/tag/v2.8.4 | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.