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

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-26 · updated 2026-10-25
• Weakness: CWE-749

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.

Affected products

• nrwl nx: from 17.0.4, < 22.7.2; from 23.0.0-beta.0, < 23.0.0-beta.2

References

• https://github.com/nrwl/nx/pull/35494
• https://github.com/nrwl/nx/security/advisories/GHSA-g2r8-wvmj-jf5w

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