CVE-2026-27778

HIGH

ePower epower.ie - Denial of Service via WebSocket Authentication Request Flood

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2026-27778. PoCs published by adminlove520, KimJ6.

AI-analyzed exploit summary This repository contains a functional proof-of-concept for CVE-2026-27778, demonstrating an authentication bypass vulnerability (CWE-307) via brute-force attacks on a WebSocket-based authentication system. It includes both an attack script and a server simulator to analyze the vulnerability.

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

Exploits (2)

github WORKING POC 4 stars
by adminlove520 · pythonpoc
https://github.com/adminlove520/CVE-Poc_All_in_One/tree/main/2026/CVE-2026-27778

This repository contains a functional proof-of-concept for CVE-2026-27778, demonstrating an authentication bypass vulnerability (CWE-307) via brute-force attacks on a WebSocket-based authentication system. It includes both an attack script and a server simulator to analyze the vulnerability.

Classification
Working Poc 95%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: WebSocket-based authentication systems (generic)
No auth needed
Prerequisites: WebSocket endpoint accessible · No rate-limiting or brute-force protection
devstral-2 · analyzed May 24, 2026 Full analysis →
nomisec WORKING POC
by KimJ6 · poc
https://github.com/KimJ6/PoC-Simulator_CVE-2026-27778

This repository contains a functional proof-of-concept for CVE-2026-27778, demonstrating a brute-force attack (CWE-307) against a WebSocket-based authentication system. The exploit simulates rapid authentication attempts to bypass rate-limiting mechanisms.

Classification
Working Poc 90%
Attack Type
Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: WebSocket-based authentication server (version unspecified)
No auth needed
Prerequisites: WebSocket connection to target server · knowledge of authentication request format
devstral-2 · analyzed May 04, 2026 Full analysis →

Scores

CVSS v3 7.5
EPSS 0.0060
EPSS Percentile 43.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-307
Status published
Products (2)
epower/epower.ie
ePower/epower.ie All versions
Published Mar 06, 2026
Tracked Since Mar 06, 2026