CVE-2026-6043

HIGH

Insecure Default Configuration in P4 Server

Title source: cna
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for CVE-2026-6043. PoCs published by flyingllama87.

AI-analyzed exploit summary This repository contains functional exploit code targeting Perforce Helix Core servers with insecure defaults (CVE-2026-6043). It includes tools for unauthenticated user enumeration, password brute-forcing, and remote depot access via the 'remote' user. The tools leverage the Perforce binary protocol (port 1666) to exploit misconfigurations like unauthenticated user listing and lack of rate-limiting.

Description

P4 Server versions prior to 2026.1 are configured with insecure default settings that, when exposed to untrusted networks, allow unauthenticated attackers to create arbitrary user accounts, enumerate existing users, authenticate to accounts with no password set, and access depot contents via the built-in 'remote' user. These default settings, taken together, can lead to unauthorized access to source code repositories and other managed assets. The 2026.1 release, expected in May 2026, enforces secure-by-default configurations on upgrade and new installations

Exploits (1)

nomisec WORKING POC
by flyingllama87 · poc
https://github.com/flyingllama87/p4wned

This repository contains functional exploit code targeting Perforce Helix Core servers with insecure defaults (CVE-2026-6043). It includes tools for unauthenticated user enumeration, password brute-forcing, and remote depot access via the 'remote' user. The tools leverage the Perforce binary protocol (port 1666) to exploit misconfigurations like unauthenticated user listing and lack of rate-limiting.

Classification
Working Poc 95%
Attack Type
Info Leak | Auth Bypass
Complexity
Moderate
Reliability
Reliable
Target: Perforce Helix Core Server (versions below 2025.1 with security < 4)
No auth needed
Prerequisites: Perforce CLI binary (p4) · local p4d instance for remote depot scanning · Perforce C++ API for brute-force tool
devstral-2 · analyzed Apr 27, 2026 Full analysis →

Scores

CVSS v4 8.8
EPSS 0.0046
EPSS Percentile 36.0%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-1188
Status published
Products (1)
Perforce/Helix Core Server (P4D) < 2025.2
Published Apr 24, 2026
Tracked Since Apr 24, 2026