CVE-2026-31904: The WebSocket Application Programming Interface lacks restrictions on the number of authentication requests

This month

HIGH 7.5REMOTEMITIGATE

CVE-2026-31904 is a high-severity flaw (CVSS 7.5) affecting charge portal. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The 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.

Why this priority

High severity
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-307
Published	2026-03-20
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: ctek

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-20 23:16 UTCPublished CVE record published
2026-06-17 10:34 UTCUpdated Record last modified

ctek charge portal MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy charge-portal || rpm -q charge-portal || charge-portal --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-31904?

charge portal: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-31904 being exploited?

CVE-2026-31904 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-31904 affect?

CVE-2026-31904 affects charge portal. Severity is high (CVSS 7.5). The 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 c

How urgent is CVE-2026-31904?

Priority 41/100. High severity; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-27649 HIGH 7.3 MITIGATE The WebSocket backend uses charging station identifiers to uniquely associate sessions but allows multiple end
CVE-2026-25192 CRITICAL 9.4 MITIGATE WebSocket endpoints lack proper authentication mechanisms, enabling attackers to perform unauthorized station

References

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