# CVE-2026-0969: Arbitrary code execution in React server-side rendering of untrusted MDX content

> CVE-2026-0969: Arbitrary code execution in React server-side rendering of untrusted MDX content. CVSS 8.8 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-0969
Last updated: 2026-06-17T10:11:42Z

- Published: 2026-02-12 01:35 UTC · Updated: 2026-06-17 10:11 UTC · Assigner: HashiCorp
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS: 0.65%, 51th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-94

## 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. This vulnerability, CVE-2026-0969, is fixed in next-mdx-remote 6.0.0.

## Affected vendors and products

- HashiCorp: Shared library

## Tracked companies

- [HashiCorp](https://rewindex.com/company/hashicorp.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-0969)
- [NVD entry](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://discuss.hashicorp.com/t/hcsec-2026-01-arbitrary-code-execution-in-react-server-side-rendering-of-untrusted-mdx-content/77155)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-0969 · Markdown: https://rewindex.com/cve/CVE-2026-0969.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-0969 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:25.557Z