SVGO, short for SVG Optimizer, is a Node.js library and command-line application for optimizing SVG files. From version 2.1.0 to before version 2.8.1, from version 3.0.0 to before version 3.3.3, and before version 4.0.1, SVGO accepts XML with custom entities, without guards against entity expansion or recursion. This can result in a small XML file (811 bytes) stalling the application and even crashing the Node.js process with JavaScript heap out of memory. This issue has been patched in versions 2.8.1, 3.3.3, and 4.0.1.
History

Fri, 06 Mar 2026 07:30:00 +0000

Type Values Removed Values Added
Description SVGO, short for SVG Optimizer, is a Node.js library and command-line application for optimizing SVG files. From version 2.1.0 to before version 2.8.1, from version 3.0.0 to before version 3.3.3, and before version 4.0.1, SVGO accepts XML with custom entities, without guards against entity expansion or recursion. This can result in a small XML file (811 bytes) stalling the application and even crashing the Node.js process with JavaScript heap out of memory. This issue has been patched in versions 2.8.1, 3.3.3, and 4.0.1.
Title SVGO: DoS through entity expansion in DOCTYPE (Billion Laughs)
Weaknesses CWE-776
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-03-06T07:23:05.716Z

Updated: 2026-03-06T07:23:05.716Z

Reserved: 2026-03-03T20:51:43.482Z

Link: CVE-2026-29074

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-06T08:16:26.920

Modified: 2026-03-06T08:16:26.920

Link: CVE-2026-29074

cve-icon Redhat

No data.