CVE-2024-54156
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 · uneditedIn JetBrains YouTrack before 2024.3.52635 multiple merge functions were vulnerable to prototype pollution attack
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 confidenceMultiple merge functions in JetBrains YouTrack before version 2024.3.52635 are vulnerable to prototype pollution attacks. This JavaScript vulnerability allows attackers to modify Object.prototype properties by manipulating input to merge operations, potentially leading to privilege escalation or unexpected application behavior.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 2024.3.52635CVSS 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
- Low
- Integrity
- Low
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
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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Check YouTrack versionNavigate to Administration > Diagnostics > About in the YouTrack UI, or inspect the build number in the installation directory (youtrack.jar or changelog.xml). Compare the version to 2024.3.52635.Affected if Installed version is below 2024.3.52635 (e.g., 2024.3.12345 or earlier)
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Identify custom plugins using merge operationsReview any custom plugins, scripts, or integrations in the /plugins or /scripts directories. Look for code that uses JavaScript Object.assign, $.extend, or custom merge functions handling user-controlled input.Affected if Custom plugins or scripts contain merge logic that processes external input without sanitizing object keys
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Check for exposed API endpoints accepting merge payloadsReview REST API documentation or network traffic for endpoints that accept JSON objects and pass them to merge operations. Use browser developer tools or server logs to identify POST/PUT requests with nested object parameters.Affected if API endpoints accept JSON payloads containing __proto__, constructor, or other object properties that could be merged into Object.prototype
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Inspect server-side request handlingExamine YouTrack server logs and request traces for any merge-related operations. Look for patterns like 'merge', 'Object.assign', or deep merge utility calls in request handlers.Affected if Server logs show merge operations processing requests with potentially malicious object keys
A YouTrack installation is affected if its version is below 2024.3.52635 and it processes external input through merge operations, either via custom plugins, API endpoints, or integrated systems.
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.
dbcve · scoped2024.3.52635
Upgrade YouTrack to version 2024.3.52635 or later to patch the vulnerable merge functions.
2024.3.52635 or later
- Upgrade YouTrack to version 2024.3.52635 or later
- Verify the upgrade by checking the YouTrack version in Administration > Application section
- Review the YouTrack 2024.3 release notes for any configuration or migration requirements
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation4.0 h
- Testing3.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $3,088.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-54156 — 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-2024-54156 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
- No weaponised exploit code, or anything meant to cause harm
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