Path Traversal Vulnerability in Umbraco Forms by Umbraco
CVE-2026-24687

6MEDIUM

Key Information:

Vendor

Umbraco

Status
Umbraco.forms.issues
Vendor
CVE Published:
29 January 2026

What is CVE-2026-24687?

Umbraco Forms, a popular form builder for the Umbraco content management system, has been identified with a path traversal vulnerability that could allow authenticated backoffice users to traverse the filesystem and access sensitive file contents. This issue is applicable to Mac and Linux installations of Umbraco. Users on Umbraco Cloud, which operates in a Windows environment, are not affected. The vulnerability exists in versions 16 and 17 of Umbraco Forms and has been addressed in updates 16.4.1 and 17.1.1. For those unable to upgrade immediately, it is advisable to mitigate risks by employing a Web Application Firewall (WAF) or reverse proxy to block path traversal attempts, restricting access to the backoffice from trusted IPs, or completely disabling the export feature by blocking the relevant endpoint.

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Affected Version(s)

Umbraco.Forms.Issues >= 16.0.0, < 16.4.1 < 16.0.0, 16.4.1

Umbraco.Forms.Issues >= 17.0.0, < 17.1.1 < 17.0.0, 17.1.1

References

https://github.com/umbraco/Umbraco.Forms.Issues/security/...
x_refsource_CONFIRM

CVSS V4

Score:
6
Severity:
MEDIUM
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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