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Node.js CVE-2026-29074

HIGH
Improper Restriction of Recursive Entity References in DTDs (CWE-776)
2026-03-06 security-advisories@github.com GHSA-xpqw-6gx7-v673
Node.js Golang Denial Of Service Svgo Red Hat Suse
7.5
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SUSE
HIGH
qualitative
Red Hat
7.5 HIGH
qualitative

Primary rating from GitHub Advisory.

CVSS VectorGitHub Advisory

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

Lifecycle Timeline

4
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
Analysis Generated
Mar 12, 2026 - 22:06 vuln.today
PoC Detected
Mar 10, 2026 - 19:02 vuln.today
Public exploit code
CVE Published
Mar 06, 2026 - 08:16 nvd
HIGH 7.5

Blast Radius

ecosystem impact
† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth
  • 1 npm packages depend on svgo (1 direct, 0 indirect)

Ecosystem-wide dependent count for version 2.1.0.

DescriptionGitHub Advisory

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.

AnalysisAI

Denial of service in SVGO versions 2.1.0-2.8.0, 3.0.0-3.3.2, and before 4.0.1 allows unauthenticated attackers to crash the Node.js process through XML entity expansion attacks, with a minimal 811-byte payload triggering heap exhaustion. Public exploit code exists for this vulnerability, and no patch is currently available. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Craft malicious SVG with recursive XML entities
Delivery
Submit to SVGO parser
Exploit
Trigger exponential entity expansion
Execution
Exhaust heap memory
Impact
Crash Node.js process
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Vulnerability AssessmentAI

Exploitation SVGO versions 2.1.0–2.8.0, 3.0.0–3.3.2, or 4.0.0 processing untrusted SVG files without entity expansion validation disabled. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment CVSS 7.5 (HIGH). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker could exploit this vulnerability to a small XML file (811 bytes) stalling the application and even crashing the Node.
Remediation Monitor vendor advisories for a patch. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours: Identify all internal systems and dependencies using SVGO (versions 2.1.0-2.8.0, 3.0.0-3.3.2, and 4.0.0) through software composition analysis and inventory review. …

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Vendor StatusVendor

SUSE

Severity: High
Product Status
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CVE-2026-29074 vulnerability details – vuln.today
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