What is GHSA-g4xw-jxrg-5f6m?

GHSA-g4xw-jxrg-5f6m is a security advisory published by GitHub Security Advisories with High severity. next-mdx-remote affected by arbitrary code execution in React server-side rendering of untrusted MDX content

Which CVE IDs does GHSA-g4xw-jxrg-5f6m cover?

GHSA-g4xw-jxrg-5f6m covers the following CVE IDs: CVE-2026-0969. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-g4xw-jxrg-5f6m?

GHSA-g4xw-jxrg-5f6m has a CVSS v3 base score of 8.8, published by GitHub Security Advisories.

Which products are affected by GHSA-g4xw-jxrg-5f6m?

GHSA-g4xw-jxrg-5f6m affects 1 product, including: npm/next-mdx-remote:\u003e= 4.3.0, \u003c 6.0.0.

GHSA-g4xw-jxrg-5f6mHighCVSS 8.8

next-mdx-remote affected by arbitrary code execution in React server-side rendering of untrusted MDX content

Vendor

GitHub Security Advisories

Published

February 12, 2026

Last Modified

February 24, 2026

🔗 CVE IDs covered (1)

CVE-2026-0969 →

📋 Description

The serialize function used to compile MDX in next-mdx-remote is vulnerable to arbitrary code execution due to insufficient sanitization of MDX content.

🎯 Affected products1

npm/next-mdx-remote:>= 4.3.0, < 6.0.0

🔗 References (5)

https://nvd.nist.gov/vuln/detail/CVE-2026-0969
https://discuss.hashicorp.com/t/hcsec-2026-01-arbitrary-code-execution-in-react-server-side-rendering-of-untrusted-mdx-content/77155
https://github.com/hashicorp/next-mdx-remote/commit/4d527fdcaed911b87f427d0b4d3c711e817fa4b3
https://github.com/hashicorp/next-mdx-remote/releases/tag/v6.0.0
https://github.com/advisories/GHSA-g4xw-jxrg-5f6m