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 | Jul 20, 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
References
github.com: https://github.com/svg/svgo/security/advisories/GHSA-xpqw-6gx7-v673 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-29074 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2445132 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29074.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:13512 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:6277 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:7110 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:13553 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:6309 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:13545 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:9742 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:13826 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:5807 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:24977 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19712 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:21772 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:8483 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:8484 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:8490 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:8491 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:8493 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:11856 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:21017 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:6568 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:19375 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:22465 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:11916 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:6926