CVE-2026-50176
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 · uneditedThe WebSocket Application Programming Interface lacks restrictions on the number of authentication requests. This absence of rate limiting may allow an attacker to conduct denial-of-service attacks or brute-force attacks to gain unauthorized access.
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 WebSocket API lacks rate limiting on authentication requests, allowing unlimited authentication attempts that could enable brute-force attacks to gain unauthorized access or exhaust server resources through excessive authentication requests.
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
- 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 WebSocket endpoints in useReview server configuration files, application logs, or network traffic for WebSocket connections (ws:// or wss:// protocols). Look for WebSocket upgrade headers in HTTP traffic or WebSocket-specific configuration in your web server (e.g., nginx, Apache, or application server settings).Affected if WebSocket endpoints are exposed and accessible without any rate limiting controls on authentication paths
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Locate WebSocket authentication configurationExamine your application code or API gateway configuration where WebSocket upgrade requests handle authentication. Check for auth endpoints, token validation, or handshake logic that processes credentials during WebSocket connection establishment.Affected if Authentication logic exists for WebSocket connections but no rate limiting mechanism is configured
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Verify rate limiting on auth endpointsInspect rate limiting configuration files, middleware settings, or security policies for rules that apply to WebSocket authentication endpoints. Look for token bucket, sliding window, or similar rate limiting configurations targeting auth paths.Affected if Rate limiting rules do not explicitly include WebSocket authentication endpoints or the handshake phase
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Test for rate limit enforcementSend multiple WebSocket connection requests with authentication credentials in quick succession. Observe whether requests are throttled, rejected, or limited after a certain number of attempts within a time window.Affected if Requests are not throttled and unlimited authentication attempts are allowed through the WebSocket handshake
If WebSocket endpoints handle authentication without explicit rate limiting rules, the environment is affected by this vulnerability.
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 dataImplement rate limiting on WebSocket authentication endpoints using techniques such as token bucket or sliding window algorithms to restrict the number of authentication attempts per client per time period.
- Consultation3.0 h
- Implementation6.0 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 $3,984.
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Free · runs locallyCheck whether your project pulls in CVE-2026-50176 — 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-2026-50176 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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A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.
- 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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