API Security Flaw in Umbraco Engage Business Intelligence Platform
CVE-2026-27449

7.5HIGH

Key Information:

Vendor

Umbraco

Status
Umbraco.engage.forms
Vendor
CVE Published:
26 February 2026

What is CVE-2026-27449?

A security flaw has been discovered in Umbraco Engage prior to versions 16.2.1 and 17.1.1, where specific API endpoints lack necessary authentication and authorization checks. These endpoints are accessible over the network without requiring user credentials or a valid session, enabling unauthenticated attackers to exploit the vulnerability. By manipulating a user-controlled identifier parameter, attackers can enumerate through records and potentially extract a wide range of sensitive data, including analytics and customer information. This highlights a significant risk to data confidentiality and emphasizes the necessity for users to upgrade to the latest patched versions to safeguard against such threats.

Affected Version(s)

Umbraco.Engage.Forms < 16.2.1 < 16.2.1

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

References

https://github.com/umbraco/Umbraco.Engage.Issues/security...
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CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.