CVE-2026-31904
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 by suppressing or mis-routing legitimate charger telemetry, or conduct 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 endpoints, allowing unlimited authentication requests. Attackers can exploit this to conduct denial-of-service attacks by flooding the system, disrupt legitimate charger telemetry (mis-routing or suppression), or perform brute-force attacks to gain unauthorized access.
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 dataall versionsCVSS 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 authentication endpointsReview application documentation or network traffic logs to locate the WebSocket endpoints used for authentication in Ctek Charge Portal. These typically include endpoints that handle login, token refresh, or session establishment.Affected if WebSocket authentication endpoints exist and are accessible without documented rate limiting controls
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Inspect rate limiting configurationExamine the Ctek Charge Portal configuration files, WebSocket server settings, or API gateway rules for any rate limiting, throttling, or request count restrictions applied to the identified authentication endpoints.Affected if No rate limiting or throttling configuration is found for WebSocket authentication endpoints
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Check authentication endpoint for request limitsReview the WebSocket server or application configuration to determine if there are any limits on authentication attempts per time window (e.g., requests per second, minute, or hour).Affected if No request rate limits are defined or enforced on authentication endpoints
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Verify account lockout or brute-force protectionInspect authentication security settings to see if account lockout policies, IP-based blocking, or failed attempt counters are implemented for WebSocket authentication.Affected if No brute-force protection mechanisms (account lockout, attempt tracking) are configured on WebSocket auth endpoints
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Review logs for authentication abuse indicatorsExamine authentication and access logs for patterns indicating possible abuse: high volumes of auth requests from single sources, repeated failed authentication attempts, or unusual telemetry disruption patterns.Affected if Logs show high-volume authentication requests or suspected abuse without triggering blocks
A user is affected if Ctek Charge Portal WebSocket authentication endpoints lack rate limiting, throttling, or brute-force protection controls.
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 and throttling on WebSocket authentication endpoints to restrict the number of requests per time window, combined with account lockout policies to mitigate brute-force attempts.
- 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.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-31904 — 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-2026-31904 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
- No spam, self-promotion, credentials, or personal data