CVE-2026-104854: Privilege Escalation

Description

Nx is a monorepo solution for TypeScript and polyglot codebases. From 14.6.0 until 22.7.9 and 23.1.2, Nx creates Unix domain sockets for its daemon and isolated plugin workers in shared temporary locations without owner-only directory and socket permissions. Another unprivileged local account on a shared build server, developer host, or multi-user container can discover and connect to a running socket because the transport performs no authentication and relies on filesystem containment. The daemon's PROCESS_IN_BACKGROUND request accepts a module path and invokes its default export, allowing a caller that controls a file to execute code as the account running Nx; other handlers can expose workspace file contents, project graphs, and task hashes. Disabling the daemon alone does not remove the vulnerable plugin-worker sockets, while single-user machines without another local account are not exposed. This issue is fixed in versions 22.7.9 and 23.1.2.

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Weakness Type (CWE)

CWE-269 CWE-269

CWE-732 CWE-732

References

Other References

https://github.com/nrwl/nx/commit/3298fd8b2dd066167eb3cc0410643994a59b0bba https://github.com/nrwl/nx/commit/63e1abb287a3d69f8ba981828a1de325d0d3dc68 https://github.com/nrwl/nx/commit/71c2253b6aac23b008e192c4e2642c42a5e07545 https://github.com/nrwl/nx/pull/36370 https://github.com/nrwl/nx/releases/tag/22.7.9 https://github.com/nrwl/nx/releases/tag/23.1.2 https://github.com/nrwl/nx/security/advisories/GHSA-w3vv-58gj-gw77

Frequently Asked Questions

What is CVE-2026-104854? +

Nx is a monorepo solution for TypeScript and polyglot codebases. From 14.6.0 until 22.7.9 and 23.1.2, Nx creates Unix domain sockets for its daemon and isolated plugin workers in shared temporary locations without owner-only directory and socket permissions. Another unprivileged local account on a shared build server, developer host, or multi-user container can discover and connect to a running socket because the transport performs no authentication and relies on filesystem containment. The daemon's PROCESS_IN_BACKGROUND request accepts a module path and invokes its default export, allowing a caller that controls a file to execute code as the account running Nx; other handlers can expose workspace file contents, project graphs, and task hashes. Disabling the daemon alone does not remove the vulnerable plugin-worker sockets, while single-user machines without another local account are not exposed. This issue is fixed in versions 22.7.9 and 23.1.2.

How do I check if I'm vulnerable to CVE-2026-104854? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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