SVGO: removeScripts allows executable links through namespace and control-character bypasses (svg svgo)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.53 % · percentile 45 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Deferred
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.
Weaknesses (CWE)
- CWE-79 — Improper Neutralization of Input During Web Page Generation
- CWE-184 — Incomplete List of Disallowed Inputs
References
- https://github.com/svg/svgo/security/advisories/GHSA-w27v-7q3p-w38r
- https://github.com/svg/svgo/pull/2268
- https://github.com/svg/svgo/pull/2269
- https://github.com/svg/svgo/pull/2272
- https://github.com/svg/svgo/commit/0557385564a5c6c11d76cd934a6cff94451e532c
- https://github.com/svg/svgo/commit/3db3ef33e409a0bc0fdaf255e46c908b00e93bc2
- https://github.com/svg/svgo/commit/994a9f00d79ddec68ce19a1ce9eb8ca08d747e4f
- https://github.com/svg/svgo/releases/tag/v2.8.4
- https://github.com/svg/svgo/releases/tag/v3.3.5
- https://github.com/svg/svgo/releases/tag/v4.1.0
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N | GitHub_M |
| CVSS 3.1 | HIGH 8.2 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N | NVD · security-advisories@github.com (Secondary) |
Advisories
- GHSA-w27v-7q3p-w38r — SVGO: removeScripts allows executable links through namespace and control-character bypasses
European references
- ENISA EUVD · EUVD-2026-69653
- GCVE · GCVE-0-2026-84370
CERT-FR advisories
- CERTFR-2026-AVI-1293 — Multiples vulnérabilités dans MongoDB · cert.ssi.gouv.fr
Affected products
| Product | Versions |
|---|---|
| svg · svgo | affected >= 1.0.0, < 2.8.4 ; affected >= 3.0.0, < 3.3.5 ; affected >= 4.0.0, < 4.1.0 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |