Missing Authorization Affecting node package, versions [25.0.0,25.3.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-UPSTREAM-NODE-14988128
- published16 Jan 2026
- disclosed13 Jan 2026
- creditmufeedvh
Introduced: 13 Jan 2026
CVE-2026-21636 (opens in a new tab)How to fix?
Upgrade node to version 25.3.0 or higher.
Overview
node is a JavaScript runtime built on Chrome's V8 JavaScript engine.
Affected versions of this package are vulnerable to Missing Authorization due to the Permission Model (--permission) failing to correctly restrict connections to Unix Domain Sockets (UDS). Even if network access is restricted (i.e., the user has not granted --allow-net), the permission system allows connections to local sockets. An attacker can provide malicious inputs (such as URLs or socketPath options) to APIs like net.connect(), tls.connect(), or undici/fetch. These inputs cause the application to connect to arbitrary local sockets on the host machine.