CVE-2026-21711
Description
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.
How to fix
- nodejs node.js20.0.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nodejs node.js | v < 20.0.0, 25.0.0 ≤ v ≤ 25.8.1 | 20.0.0 |
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