Identical PCs may be merged into one device when using the same login

Open
  • Is something wrong?
#89 2 comments 0 reactions 1 assignee View on GitHub

Maintainers usually reply within 1 day

@oschwartz10612 is already working on this.

Since Nov 12, 2026.

Assessment

This issue has not been assessed yet.

Description

bug needs investigating
Describe the Bug

When a machine uses an OEM placeholder serial number (e.g., System Serial Number), its fingerprint is not unique. As a result, two PCs of the same model generate the same fingerprint.

When a second PC signs in using the same Pangolin user account, device approval is not triggered, and the second PC receives the same OLM as the first PC. This causes both devices to share the same OLM, resulting in their WireGuard peers overwriting each other and disrupting the connection.

Environment
  • OS Type & Version: Windows 11 (Any build)
  • Pangolin Version: 1.26
  • Edition (Community or Enterprise): Any
  • Gerbil Version: 1.6.0
  • Traefik Version: 3.7.13
  • Newt Version: 1.20
  • Client Version: 0.16.0
To Reproduce
  1. Use two PCs of the same model whose BIOS serial is a placeholder (System Serial Number, To Be Filled By O.E.M., Default string, ...).
  2. Install the client on PC A, sign in as user X, connect.
  3. Install the client on PC B, sign in as the same user X, connect.
AI Disclosure

No AI used in writing this bug report.

Expected Behavior

PC B gets its own OLM, appears as a second device, and requires device approval. Both PCs remain connected.

Dominant language
Go
Stars
26
Forks
10
Avg merge
5h 49m
Merged PRs (30d)
12

Getting set up

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from fosrl/windows-linux

All issues in fosrl/windows-linux

Similar issues

More Go issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.