CVE-2026-21715 Missing authorization in node
Attackers can bypass Node.js filesystem read restrictions using fs.realpathSync.native() to enumerate files outside permitted directories.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-21715?
CVE-2026-21715 is a low-severity missing authorization vulnerability in Nodejs Node.js, published on 30 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw in Node.js Permission Model filesystem enforcement leaves `fs.realpathSync.native()` without the required read permission checks, while all comparable filesystem functions correctly enforce them. As a result, code running under `--permission` with restricted `--allow-fs-read` can still use `fs.realpathSync.native()` to check file existence, resolve symlink targets, and enumerate filesystem paths outside of permitted directories. This vulnerability affects **20.x, 22.x, 24.x, and 25.x** processes using the Permission Model where `--allow-fs-read` is intentionally restricted.
Weakness: CWE-732
Which versions are affected by CVE-2026-21715?
2 open source packages ship an affected version, including node and node-min. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
node Bitnami | All versions | 20.20.2, 22.22.2, 24.14.1, 25.8.2 |
node-min Bitnami | All versions | 20.20.2, 22.22.2, 24.14.1, 25.8.2 |
Products include Nodejs Node.js.
How do I fix CVE-2026-21715?
Upgrade node to a fixed version for your release line: 20.20.2, 22.22.2, 24.14.1 or 25.8.2.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-21715 being exploited?
There is no known exploitation of CVE-2026-21715 in the wild and no public exploit code.
Other vulnerabilities in Nodejs Node.js
Sources
Also known as ALPINE-CVE-2026-21715, AZL-81230, AZL-81263, BELL-CVE-2026-21715, BIT-node-2026-21715, BIT-node-min-2026-21715 and 11 more.