CVE-2024-34394
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedlibxmljs2 is vulnerable to a type confusion vulnerability when parsing a specially crafted XML while invoking the namespaces() function (which invokes XmlNode::get_local_namespaces()) on a grand-child of a node that refers to an entity. This vulnerability can lead to denial of service and remote code execution.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidencelibxmljs2 has a type confusion vulnerability in the XmlNode::get_local_namespaces() function, triggered when calling namespaces() on a grand-child node that references an entity. This type confusion can lead to memory corruption, enabling denial of service or potentially remote code execution.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- High
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify libxmljs2 installation and versionRun 'npm list libxmljs2' or check package.json dependencies. Also check node_modules/libxmljs2/package.json for the installed version.Affected if The installed version is lower than the patched version (check against vendor advisories).
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Confirm XML parsing is performedSearch codebase for require('libxmljs2') or import statements, and identify code that calls .parse() or similar XML parsing methods on the library.Affected if The application uses libxmljs2 to parse XML documents.
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Check for entity reference handling in parsed XMLReview the XML sources being parsed. Look for DTD definitions with ENTITY declarations, or XML that uses &entity; syntax. Search for code paths that may process untrusted or user-supplied XML.Affected if Parsed XML documents contain or could contain entity references (&anything; syntax).
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Verify namespaces() method is invoked on nodesSearch the codebase for calls to .namespaces() method on XmlNode objects returned from parsing. This is the specific trigger function.Affected if Code calls the namespaces() method on nodes parsed from XML containing entity references.
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Assess grand-child node access patternsReview code that traverses parsed XML nodes. The vulnerability triggers when namespaces() is called on a grand-child node (a child of a child) that references an entity. Look for nested element access patterns.Affected if Application code accesses child nodes of child nodes and calls namespaces() on them from XML with entities.
You are affected if libxmljs2 is installed with a vulnerable version, your application parses XML with entity references using this library, and code path reaches the namespaces() method on grand-child nodes derived from entity-containing documents.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
From vendor dataUpgrade libxmljs2 to the latest version containing the patch. Until then, avoid parsing untrusted or specially crafted XML documents, especially those containing entity references.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-34394 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-34394 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Version or environment caveats, and links to real fixes
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