CVE-2026-29074

SVGO: DoS through entity expansion in DOCTYPE (Billion Laughs)

Published Mar 6, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-xpqw-6gx7-v673 SVGO DoS through entity expansion in DOCTYPE (Billion Laughs)
References
Link Providers
https://access.redhat.com/errata/RHSA-2026:11856 cve-icon
https://access.redhat.com/errata/RHSA-2026:11916 cve-icon
https://access.redhat.com/errata/RHSA-2026:13512 cve-icon
https://access.redhat.com/errata/RHSA-2026:13545 cve-icon
https://access.redhat.com/errata/RHSA-2026:13553 cve-icon
https://access.redhat.com/errata/RHSA-2026:13826 cve-icon
https://access.redhat.com/errata/RHSA-2026:19375 cve-icon
https://access.redhat.com/errata/RHSA-2026:19712 cve-icon
https://access.redhat.com/errata/RHSA-2026:21017 cve-icon
https://access.redhat.com/errata/RHSA-2026:21772 cve-icon
https://access.redhat.com/errata/RHSA-2026:22465 cve-icon
https://access.redhat.com/errata/RHSA-2026:24977 cve-icon
https://access.redhat.com/errata/RHSA-2026:48085 cve-icon
https://access.redhat.com/errata/RHSA-2026:5807 cve-icon
https://access.redhat.com/errata/RHSA-2026:6277 cve-icon
https://access.redhat.com/errata/RHSA-2026:6309 cve-icon
https://access.redhat.com/errata/RHSA-2026:6568 cve-icon
https://access.redhat.com/errata/RHSA-2026:6926 cve-icon
https://access.redhat.com/errata/RHSA-2026:7110 cve-icon
https://access.redhat.com/errata/RHSA-2026:8483 cve-icon
https://access.redhat.com/errata/RHSA-2026:8484 cve-icon
https://access.redhat.com/errata/RHSA-2026:8490 cve-icon
https://access.redhat.com/errata/RHSA-2026:8491 cve-icon
https://access.redhat.com/errata/RHSA-2026:8493 cve-icon
https://access.redhat.com/errata/RHSA-2026:9742 cve-icon
https://access.redhat.com/security/cve/CVE-2026-29074 cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2445132 cve-icon
https://github.com/svg/svgo/security/advisories/GHSA-xpqw-6gx7-v673 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-29074 cve-icon
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-29074.json cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-29074 cve-icon
History
Type Values Removed Values Added
First Time appeared Svgo
Svgo svgo
CPEs cpe:2.3:a:svgo:svgo:*:*:*:*:*:node.js:*:*
Vendors & Products Svgo
Svgo svgo
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Svg
Svg svgo
Vendors & Products Svg
Svg svgo
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Sep 10, 2026, 12:04 PM
Reserved
Mar 3, 2026, 8:51 PM
Status
Modified
Published
Mar 6, 2026, 8:16 AM
Modified
Sep 10, 2026, 1:18 PM
Severity
Important
Public date
Mar 6, 2026, 7:23 AM