CVE-2026-54753: Nx: `nx graph` dev server permissive CORS policy

Vulnerability summary

CVE-2026-54753 is a medium (CVSS 5.9) Exposed Dangerous Method or Function vulnerability in nrwl nx. EPSS estimates a 1.20% chance of exploitation in the next 30 days, higher than 68% of scored vulnerabilities.

Timeline

1. 26-06-2026
   PublishedVulnerability first disclosed.
2. 26-06-2026
   Last modifiedVulnerability information updated.

Description

Nx is a monorepo solution for TypeScript and polyglot codebases. From 17.0.4 until 22.7.2 and 23.0.0-beta.2, the local HTTP server started by nx graph sent Access-Control-Allow-Origin: * on every response, letting any website a developer visited read the server's responses cross-origin — including the full project graph and the output of the /help endpoint, which runs a target's configured help command. The practical impact is typically cross-origin information disclosure, but can be arbitrary command injection in rare cases. This vulnerability is fixed in 22.7.2 and 23.0.0-beta.2.

• CWE-749Exposed Dangerous Method or FunctionThe product provides an Applications Programming Interface (API) or similar interface for interaction with external actors, but the interface includes a dangerous method or function that is not properly restricted.
• CWE-942Permissive Cross-domain Security Policy with Untrusted DomainsThe product uses a web-client protection mechanism such as a Content Security Policy (CSP) or cross-domain policy file, but the policy includes untrusted domains with which the web client is allowed to communicate.