Arbitrary Code Execution Vulnerability in MDX Compilation for next-mdx-remote by HashiCorp
CVE-2026-0969

8.8HIGH

Key Information:

Vendor

Hashicorp
Status
Shared Library
Vendor
CVE Published:
12 February 2026

What is CVE-2026-0969?

The serialization function used in next-mdx-remote for compiling MDX content exhibits a vulnerability that allows attackers to execute arbitrary code. This issue arises from inadequate sanitization measures applied to the MDX content, leading to significant security risks during server-side rendering when untrusted MDX content is processed. It is crucial for users of next-mdx-remote to evaluate their use cases and implement necessary security measures to mitigate potential exploits.

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Affected Version(s)

Shared library 64 bit 4.3.0 < 6.0.0

References

https://discuss.hashicorp.com/t/hcsec-2026-01-arbitrary-c...

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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