high8.8
CVE-2026-0969
next-mdx-remote affected by arbitrary code execution in React server-side rendering of untrusted MDX content
Impact
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 packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | next-mdx-remote | >= 4.3.0, < 6.0.0 | 6.0.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://discuss.hashicorp.com/t/hcsec-2026-01-arbitrary-code-execution-in-react-server-side-rendering-of-untrusted-mdx-content/77155
- https://github.com/advisories/GHSA-g4xw-jxrg-5f6m
- https://nvd.nist.gov/vuln/detail/CVE-2026-0969
- https://github.com/hashicorp/next-mdx-remote/commit/4d527fdcaed911b87f427d0b4d3c711e817fa4b3
- https://github.com/hashicorp/next-mdx-remote/releases/tag/v6.0.0