CVE-2026-29074
SVGO: DoS through entity expansion in DOCTYPE (Billion Laughs)
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-776 |
| Vendor | svg |
| Product | svgo |
| Published | Mar 6, 2026 |
| Last Updated | Mar 6, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
svg / svgo
>= 2.1.0, < 2.8.1 >= 3.0.0, < 3.3.3 = 4.0.0