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Vulnerability record · CVE-2026-20792 · published 27 February 2026

CVE-2026-20792: Chargemap.com improper restriction of authentication attempts vulnerability

Chargemap · Chargemap.Com

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 misrouting legitimate charger telemetry, or conduct brute-force attacks to gain unauthorized access.

8.7 CVSS 4.0 High EPSS 0.50% · top 59.9% CWE-307 · Improper restriction of authentication attempts
8.7CVSS 4.0 base score
0.50%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References
17 Jun 2026Last modified by NVD

Description

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 misrouting legitimate charger telemetry, or conduct brute-force attacks to gain unauthorized access.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://chargemap.com/en-us/support Product
https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-057-05.json Third Party Advisory
https://www.cisa.gov/news-events/ics-advisories/icsa-26-057-05 Third Party AdvisoryUS Government Resource

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2026-25851Chargemap.com missing authentication for critical function vulnerabilityWebSocket endpoints lack proper authentication mechanisms, enabling attackers to perform unauthorized station impersonation and manipulate data sent …EPSS 0.96%6.9CVE-2026-25711Chargemap.com insufficient session expiration vulnerabilityThe WebSocket backend uses charging station identifiers to uniquely associate sessions but allows multiple endpoints to connect using the same sessio…EPSS 0.58%6.9CVE-2026-20791Chargemap.com insufficiently protected credentials vulnerabilityCharging station authentication identifiers are publicly accessible via web-based mapping platforms.EPSS 0.31%

Source: NIST National Vulnerability Database (record CVE-2026-20792), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.