SVGO Denial of Service via Entity Expansion (v2.1.0<2.8.1, v3.0.0<3.3.3, v4.0.0)
CVE-2026-29074 Published on March 6, 2026

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

NVD

Vulnerability Analysis

CVE-2026-29074 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
NONE
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
NONE
Integrity Impact:
NONE
Availability Impact:
HIGH

Weakness Type

What is a XEE Vulnerability?

The software uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities. If the DTD contains a large number of nested or recursive entities, this can lead to explosive growth of data when parsed, causing a denial of service.

CVE-2026-29074 has been classified to as a XEE vulnerability or weakness.


Products Associated with CVE-2026-29074

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Red Hat Ansible Automation Platform
 
Red Hat Ansible Automation Platform Developer
 
Red Hat Ansible Automation Platform Inside
 
Red Hat Advanced Cluster Security
 
Red Hat Rhdh
 
Red Hat Openshift Ai
 
Red Hat Openshift Devspaces
 
Red Hat Service Mesh
 
Red Hat Quay
 
Red Hat Cryostat
 
Red Hat Openshift Pipelines
 
Red Hat 3scale Amp
 
Red Hat Service Registry
 
Red Hat Jboss Data Grid
 
Red Hat Enterprise Linux Ai
 
Red Hat Jboss Fuse
 
Red Hat Openshift Distributed Tracing
 
Red Hat Single Sign On
 
Red Hat Ansible Portal
 
Red Hat Gatekeeper
 
Red Hat Multicluster Engine
 
Red Hat Acm
 
Red Hat Optaplanner
 
Red Hat Enterprise Linux (RHEL)
 
Red Hat Jboss Enterprise Application Platform
 
Red Hat Jbosseapxp
 
Red Hat Openshift
 

Affected Versions

svgo: Red Hat Ansible Automation Platform 2.5 for RHEL 8: Red Hat Ansible Automation Platform 2.5 for RHEL 9: Red Hat Ansible Automation Platform 2.6 for RHEL 9: Red Hat Advanced Cluster Security 4.8: Red Hat Ansible Automation Platform 2.5: Red Hat Ansible Automation Platform 2.6: Red Hat Ansible Automation Platform 2.6: Red Hat Developer Hub 1.8: Red Hat Developer Hub 1.9: Red Hat OpenShift AI 2.16: Red Hat OpenShift AI 2.25: Red Hat OpenShift AI 2.25: Red Hat OpenShift AI 3.3: Red Hat OpenShift AI 3.3: Red Hat OpenShift AI 3.3: Red Hat OpenShift Dev Spaces 3.28: Red Hat OpenShift Service Mesh 2.6: Red Hat OpenShift Service Mesh 3.0: Red Hat OpenShift Service Mesh 3.0: Red Hat OpenShift Service Mesh 3.1: Red Hat OpenShift Service Mesh 3.1: Red Hat OpenShift Service Mesh 3.2: Red Hat OpenShift Service Mesh 3.2: Red Hat OpenShift Service Mesh 3.3: Red Hat OpenShift Service Mesh 3.3: Red Hat Quay 3.1: Red Hat Quay 3.12: Red Hat Quay 3.14: Red Hat Quay 3.15: Red Hat Quay 3.16: Red Hat Quay 3.17: Red Hat Quay 3.9: Red Hat Cryostat 4: Red Hat Gatekeeper 3: Red Hat Multicluster Engine for Kubernetes: Red Hat OpenShift Pipelines: Red Hat OpenShift Pipelines: Red Hat OpenShift Pipelines: Red Hat OpenShift Pipelines: Red Hat OpenShift Service Mesh 3: Red Hat OpenShift Service Mesh 3: Red Hat 3scale API Management Platform 2: Red Hat 3scale API Management Platform 2: Red Hat 3scale API Management Platform 2: Red Hat 3scale API Management Platform 2: Red Hat 3scale API Management Platform 2: Red Hat 3scale API Management Platform 2: Red Hat 3scale API Management Platform 2: Red Hat 3scale API Management Platform 2: Red Hat 3scale API Management Platform 2: Red Hat Advanced Cluster Management for Kubernetes 2: Red Hat Ansible Automation Platform 2: Red Hat Ansible Automation Platform 2: Red Hat build of Apicurio Registry 2: Red Hat build of OptaPlanner 8: Red Hat Data Grid 8: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 8: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux 9: Red Hat Enterprise Linux AI (RHEL AI) 3: Red Hat Enterprise Linux AI (RHEL AI) 3: Red Hat Fuse 7: Red Hat JBoss Enterprise Application Platform 8: Red Hat JBoss Enterprise Application Platform 8: Red Hat JBoss Enterprise Application Platform Expansion Pack: Red Hat JBoss Enterprise Application Platform Expansion Pack: Red Hat OpenShift Container Platform 4: Red Hat OpenShift Dev Spaces: Red Hat OpenShift Dev Spaces: Red Hat OpenShift distributed tracing 3: Red Hat Single Sign-On 7: Red Hat Self-service automation portal 2:

Exploit Probability

EPSS
0.34%
Percentile
25.58%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.