Node.js up to 25.2.1 Unix Domain Socket permission

Summaryinfo

A vulnerability labeled as critical has been found in Node.js up to 25.2.1. This vulnerability affects unknown code of the component Unix Domain Socket Handler. The manipulation results in permission. This vulnerability is cataloged as CVE-2026-21636. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Node.js up to 25.2.1. It has been classified as critical. Affected is an unknown part of the component Unix Domain Socket Handler. The manipulation with an unknown input leads to a permission vulnerability. CWE is classifying the issue as CWE-275. This is going to have an impact on confidentiality. CVE summarizes:

A flaw in Node.js's permission model allows Unix Domain Socket (UDS) connections to bypass network restrictions when `--permission` is enabled. Even without `--allow-net`, attacker-controlled inputs (such as URLs or socketPath options) can connect to arbitrary local sockets via net, tls, or undici/fetch. This breaks the intended security boundary of the permission model and enables access to privileged local services, potentially leading to privilege escalation, data exposure, or local code execution. * The issue affects users of the Node.js permission model on version v25. In the moment of this vulnerability, network permissions (`--allow-net`) are still in the experimental phase.

The advisory is available at nodejs.org. This vulnerability is traded as CVE-2026-21636 since 01/01/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 02/10/2026). This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0098). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

• Red Hat Enterprise Linux
• SUSE Linux
• Oracle Linux
• RESF Rocky Linux
• Open Source Node.js

Productinfo

Type

• JavaScript Library

Name

• Node.js

Version

• 25.2.0
• 25.2.1

License

• open-source

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion