CVE-2026-24687: Umbraco.Forms has Path Traversal and File Enumeration Vulnerabilities in Linux/Mac

January 30, 2026

It’s possible for an authenticated backoffice-user to enumerate and traverse paths/files on the systems filesystem and read their contents, on Mac/Linux Umbraco installations using Forms. As Umbraco Cloud runs in a Windows environment, Cloud users aren’t affected.

References

github.com/advisories/GHSA-hm5p-82g6-m3xh
github.com/umbraco/Umbraco.Forms.Issues
github.com/umbraco/Umbraco.Forms.Issues/security/advisories/GHSA-hm5p-82g6-m3xh
nvd.nist.gov/vuln/detail/CVE-2026-24687

Code Behaviors & Features

Detect and mitigate CVE-2026-24687 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →