What’s Vulnerable › Vulnerabilities

CVE-2022-25863: Deserialization of Untrusted Data

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-06-10 · updated 2026-09-29
• Weakness: CWE-502

Description

The package gatsby-plugin-mdx before 2.14.1, from 3.0.0 and before 3.15.2 are vulnerable to Deserialization of Untrusted Data when passing input through to the gray-matter package, due to its default configurations that are missing input sanitization. Exploiting this vulnerability is possible when passing input in both webpack (MDX files in src/pages or MDX file imported as a component in frontend / React code) and data mode (querying MDX nodes via GraphQL). Workaround: If an older version of gatsby-plugin-mdx must be used, input passed into the plugin should be sanitized ahead of processing.

Affected products

• gatsby-plugin-mdx: before 2.14.1; from 3.0.0 before 3.15.2 — fixed in 2.14.1, 3.15.2

How to fix

Upgrade to a fixed version: gatsby-plugin-mdx 2.14.1, 3.15.2. Check the vendor advisory for mitigations.

References

• https://drive.google.com/file/d/1EoCzbwTWOM8-fjvwMbH3bqcZ2iKksxTW/view?usp=sharing
• https://github.com/gatsbyjs/gatsby/pull/35830
• https://github.com/gatsbyjs/gatsby/pull/35830/commits/f214eb0694c61e348b2751cecd1aace2046bc46e
• https://snyk.io/vuln/SNYK-JS-GATSBYPLUGINMDX-2405699
• https://drive.google.com/file/d/1EoCzbwTWOM8-fjvwMbH3bqcZ2iKksxTW/view?usp=sharing
• https://github.com/gatsbyjs/gatsby/pull/35830
• https://github.com/gatsbyjs/gatsby/pull/35830/commits/f214eb0694c61e348b2751cecd1aace2046bc46e
• https://snyk.io/vuln/SNYK-JS-GATSBYPLUGINMDX-2405699

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