Vulnerability-Lookup

GHSA-G4XW-JXRG-5F6M

Vulnerability from github – Published: 2026-02-12 03:31 – Updated: 2026-02-24 14:20

Summary

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

Details

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

Severity ?

8.8 (High)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "next-mdx-remote"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.3.0"
            },
            {
              "fixed": "6.0.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-0969"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-94"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-02-24T14:20:55Z",
    "nvd_published_at": "2026-02-12T03:15:46Z",
    "severity": "HIGH"
  },
  "details": "The serialize function used to compile MDX in next-mdx-remote is vulnerable to arbitrary code execution due to insufficient sanitization of MDX content.",
  "id": "GHSA-g4xw-jxrg-5f6m",
  "modified": "2026-02-24T14:20:56Z",
  "published": "2026-02-12T03:31:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-0969"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hashicorp/next-mdx-remote/commit/4d527fdcaed911b87f427d0b4d3c711e817fa4b3"
    },
    {
      "type": "WEB",
      "url": "https://discuss.hashicorp.com/t/hcsec-2026-01-arbitrary-code-execution-in-react-server-side-rendering-of-untrusted-mdx-content/77155"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/hashicorp/next-mdx-remote"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hashicorp/next-mdx-remote/releases/tag/v6.0.0"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "next-mdx-remote affected by arbitrary code execution in React server-side rendering of untrusted MDX content"
}

CVE-2026-0969 (GCVE-0-2026-0969)

Vulnerability from cvelistv5 – Published: 2026-02-12 01:35 – Updated: 2026-02-12 15:35

Title

Arbitrary code execution in React server-side rendering of untrusted MDX content

Summary

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.

Severity ?

8.8 (High)


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

CWE

CWE-94 - Improper Control of Generation of Code (Code Injection)

Assigner

HashiCorp

References

URL

Tags

https://discuss.hashicorp.com/t/hcsec-2026-01-arb…

Impacted products

	Vendor	Product	Version
	HashiCorp	Shared library	Affected: 4.3.0 , < 6.0.0 (semver)

Show details on NVD website

JSON

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-G4XW-JXRG-5F6M

CVE-2026-0969 (GCVE-0-2026-0969)

Tags

Sightings

Nomenclature