CVE-2024-39017
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 · uneditedagreejs shared v0.0.1 was discovered to contain a prototype pollution via the function mergeInternalComponents. This vulnerability allows attackers to execute arbitrary code or cause a Denial of Service (DoS) via injecting arbitrary properties.
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 confidenceThe agreejs shared library version 0.0.1 contains a prototype pollution vulnerability in the mergeInternalComponents function. Attackers can inject arbitrary properties into JavaScript objects by polluting the prototype chain, potentially achieving arbitrary code execution or causing denial of service.
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
- Low
- Privileges
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/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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Locate agreejs in your codebaseSearch for 'agreejs' in package.json dependencies, package-lock.json, or yarn.lock files. Also check node_modules/agreejs directory if present.Affected if agreejs version 0.0.1 is installed as a dependency
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Verify the exact installed versionRun 'npm list agreejs' or 'yarn list agreejs' to confirm the installed version number.Affected if The installed version is 0.0.1
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Identify mergeInternalComponents usageSearch your codebase for calls to mergeInternalComponents function, typically using grep for 'mergeInternalComponents' or 'agree.mergeInternalComponents'.Affected if The mergeInternalComponents function is called in your code
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Check if function receives external inputReview the code paths where mergeInternalComponents is called. Determine if any arguments to this function originate from user input, API requests, or untrusted data sources.Affected if User-controlled or untrusted data is passed as an argument to mergeInternalComponents
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Inspect for prototype pollution patternsAudit how objects are merged in mergeInternalComponents. Look for code patterns using Object.assign, spread operators, or deep merge functions without prototype chain protection.Affected if The merge logic does not exclude __proto__, constructor, or prototype properties from being merged
Your environment is affected if agreejs version 0.0.1 is installed AND the mergeInternalComponents function is used with untrusted input that could pollute the prototype chain.
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 dataRemediate by implementing property whitelist validation or deep-cloning objects without inheriting prototype properties in the mergeInternalComponents function, ensuring user-controlled input cannot modify Object.prototype.
- Consultation4.0 h
- Implementation6.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-39017 — 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-2024-39017 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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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
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