Node.jsApplication
CVE-2026-48937
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 · uneditedA flaw in Node.js HTTP/2 server API can cause servers to keep accepting data even after sending a `GOAWAY` frame. This vulnerability affects two supported release lines: **Node.js 22** and **Node.js 24**.
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 · high confidenceThe Node.js HTTP/2 server API incorrectly continues accepting data after sending a GOAWAY frame, which signals connection closure. This protocol violation can lead to resource exhaustion and unexpected server behavior, as clients may continue transmitting data despite the server's intent to terminate the connection.
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
Node.jsApplication
>= 22.0, < 22.23.0>= 24.0.0, < 24.17.0CVSS 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
- None
- Integrity
- None
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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 Node.js installation and versionRun `node --version` to obtain the installed Node.js version numberAffected if The version falls within the vulnerable range (unpatched 22.x or 24.x releases)
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Confirm HTTP/2 module usageSearch codebase for `require('http2')` or usage of `http2.createServer()` API callsAffected if The application imports or uses the Node.js http2 module for server functionality
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Check HTTP/2 server configurationInspect code using http2.createServer() to verify it handles client connectionsAffected if An HTTP/2 server is created and actively handling connections using the http2 API
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Verify GOAWAY frame handling behaviorSet up a test HTTP/2 client that sends data after server sends GOAWAY; observe if server continues processing that dataAffected if Server continues accepting or processing data after sending GOAWAY, indicating the vulnerability is present
You are affected if running an unpatched Node.js version in the 22.x or 24.x release lines AND your application uses the Node.js http2 server API to handle connections.
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 data22.23.024.17.0
Upgrade Node.js to versions containing the fix for CVE-2026-48937 in the 22.x or 24.x release lines. Before upgrading in production, test HTTP/2 connection termination behavior to ensure proper GOAWAY handling.
Fix this in Node.js
Scoped from the published advisory
- Consultation2.0 h
- Implementation2.0 h
- Testing4.0 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 $2,752.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-48937 — 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-2026-48937 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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