Vulnerability Description
Tina is a headless content management system. In versions prior to @tinacms/mdx 2.1.7 and tinacms 3.9.3, rich-text parsing and the default link/image renderers did not sanitize the url field on Slate link/image nodes. Content containing javascript: or data:text/html URLs — including case-variant, whitespace-padded, and control-character-obfuscated forms — is rendered into href/src and executes when the content is viewed. Any actor able to author rich-text content (for example a lower-privileged editor, or imported/external content) can achieve stored XSS against editors and site viewers. This issue is fixed in versions @tinacms/mdx 2.1.7 and tinacms 3.9.3.
Related Weaknesses (CWE)
References
- https://github.com/tinacms/tinacms/pull/7056
- https://github.com/tinacms/tinacms/security/advisories/GHSA-2vcc-5v34-9jc8
FAQ
What is CVE-2026-55661?
CVE-2026-55661 is a documented vulnerability. Tina is a headless content management system. In versions prior to @tinacms/mdx 2.1.7 and tinacms 3.9.3, rich-text parsing and the default link/image renderers did not sanitize the url field on Slat...
How severe is CVE-2026-55661?
CVSS scoring is not yet available for CVE-2026-55661. Check NVD for updates.
Is there a patch for CVE-2026-55661?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.