Medium · published March 31, 2026
A flaw in Node.js Permission Model network enforcement leaves Unix Domain Socket (UDS) server operations without the required permission checks, while all comparable network paths correctly enforce them.
As a result, code running under `--permission` without `--allow-net` can create and expose local IPC endpoints, allowing communication with other processes on the same host outside of the intended network restriction boundary.
This vulnerability affects Node.js **25.x** processes using the Permission Model where `--allow-net` is intentionally omitted to restrict network access. Note that `--allow-net` is currently an experimental feature.
| Product | Versions | Fixed in |
|---|---|---|
| nodejs/node.js | < 20.0.0 | 20.0.0 |
| nodejs/node.js | ≥ 25.0.0, ≤ 25.8.1 | — |