CVE-2026-0969

HIGH

next-mdx-remote 4.3.0-5.9.9 - Remote Code Execution via MDX Content Deserialization

Title source: llm

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.

References (1)

Core 1

Core References

Various Sources

https://discuss.hashicorp.com/t/hcsec-2026-01-arbitrary-code-execution-in-react-server-side-rendering-of-untrusted-mdx-content/77155

Scores

CVSS v3 8.8

EPSS 0.0004

EPSS Percentile 13.3%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-94

Status published

Products (2)

HashiCorp/Shared library 4.3.0 - 6.0.0

npm/next-mdx-remote 4.3.0 - 6.0.0npm

Published Feb 12, 2026

Tracked Since Feb 18, 2026