---
id: "CVE-2026-106071"
kind: "vulnerability"
aliases: ["CVE-2026-106071"]
title: "Node.js: wildcard file permission grants also allow shorter paths"
severity: "low"
cvss: 3.6
epss: 0.0014
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["node.js", "permission-model", "poc-public", "runtime", "self-hosted"]
not_affected_if: ["default-config", "no-wildcard-grants"]
published_at: "2026-10-23T17:17:20+00:00"
first_seen_at: "2026-10-23T21:57:34+00:00"
updated_at: "2026-10-25T12:38:50+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-106071", "first_seen_at": "2026-10-23T21:57:34+00:00"}, {"source": "github-poc", "url": "https://github.com/CompleteTech-LLC/node-cve-2026-106071-check", "first_seen_at": "2026-10-23T23:55:02+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-106071", "first_seen_at": "2026-10-25T12:38:50+00:00"}]
---

# Node.js: wildcard file permission grants also allow shorter paths

Node.js's Permission Model can let a process read or write a path that does not match a wildcard --allow-fs-read or --allow-fs-write rule. For example, the rule /etc/passwd.* also allows reading /etc/passwd, which bypasses the intended file restriction.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Run `node --version` and confirm whether it reports a 26.x release.
- Check whether startup scripts or deployment config use `--permission`, `--allow-fs-read` or `--allow-fs-write` with a `*` wildcard.
- Confirm the wildcard grant is the only grant under the root of the permission tree, which the sources say is required.

## Fix

- Upgrade Node.js 26.x to a patched release; the sources do not name the fixed version, so `unknown`.
- Until patched, replace wildcard file grants with explicit, exact paths.

## Timeline

- 2026-10-23T21:57:34+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-106071
- 2026-10-23T23:55:02+00:00 github-poc https://github.com/CompleteTech-LLC/node-cve-2026-106071-check
- 2026-10-25T12:38:50+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-106071

## Documents

- [poc] CompleteTech-LLC/node-cve-2026-106071-check https://github.com/CompleteTech-LLC/node-cve-2026-106071-check

## From the sources

A flaw in Node.js Permission Model filesystem enforcement can grant access to paths that do not match a wildcard `--allow-fs-read` or `--allow-fs-write` rule.

When the requested path is shorter than the prefix of a wildcard grant, the radix tree lookup stops comparing early and treats the path as a match. For example, `--allow-fs-read=/etc/passwd.*` also allows reading `/etc/passwd`. This requires the wildcard grant to sit directly under the root of the permission tree, for example when it is the only grant for that scope. This is a different root cause from CVE-2026-58043.

This vulnerability affects Node.js **26.x**.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_