gatsby-transformer-remark has possible unsanitized JavaScript code injection

Description

The gatsby-transformer-remark plugin prior to versions 5.25.1 and 6.3.2 passes input through to the gray-matter npm package, which is vulnerable to JavaScript injection in its default configuration, unless input is sanitized.

Recommendation

Update the gatsby-transformer-remark package to the latest compatible version. Followings are version details:

• Affected version(s): **< 5.25.1

  >= 6.0.0, < 6.3.2**

• Patched version(s): **5.25.1

  6.3.2**

References

• GHSA-7ch4-rr99-cqcw
• CVE-2023-22491
• CWE-20
• CWE-79
• CAPEC-310
• OWASP 2021-A3
• OWASP 2021-A6

Related Issues

• Sentry's sensitive headers are leaked when `sendDefaultPii` is set to `true` - CVE-2025-65944
• Regular Expression Denial of Service (ReDoS) in lodash (GHSA-29mw-wpgm-hmr9) - CVE-2020-28500
• Server-Side Request Forgery via /_image endpoint in Astro Cloudflare adapter - CVE-2025-58179
• CKEditor 5 cross-site scripting (XSS) vulnerability in the clipboard package - CVE-2025-58064

Tags:

npm

gatsby-transformer-remark