🛡️ CVE-2026-27449 — umbraco.engage.forms

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-284 NVD
8.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Umbraco.Engage.Forms Allows Unauthorized Access to Multiple API Endpoints

Description

A vulnerability has been identified in Umbraco Engage where certain API endpoints are exposed without enforcing authentication or authorization checks. The affected endpoints can be accessed directly over the network without requiring a valid session or user credentials. By supplying a user-controlled identifier parameter (e.g., ?id=), an attacker can retrieve sensitive data associated with arbitrary records.

Because no access control validation is performed, the endpoints are vulnerable to enumeration attacks, allowing attackers to iterate over identifiers and extract data at scale.

Impact

An unauthenticated attacker can retrieve sensitive Engage-related data by directly querying the affected API endpoints. The vulnerability allows arbitrary record access through predictable or enumerable identifiers.

The confidentiality impact is considered high. No direct integrity or availability impact has been identified.

The scope of exposed data depends on the deployment but may include analytics data, tracking data, customer-related information, or other Engage-managed content.

Patches

The vulnerability affects both v16 and v17. Patches have already been released. Users are advised to update to 16.2.1 or 17.1.1

Workarounds

_Is there a way for users to fix or remediate the vulnerability without upgrading?_

References

_Are there any links users can visit to find out more?_

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Weakness class

CVE-2026-27449 is classified as CWE-284: Improper Access Control. The software does not restrict an action to the actors that should be allowed to perform it.

Affected software

CVE-2026-27449 is recorded against 2 packages.

  • umbraco.engage.forms (from 17.0.0 up to 17.1.1)
  • unknown

Timeline and source

Published on 27 February 2026 and last revised on 19 March 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

github.com (Web)
nvd.nist.gov (Advisory)
github.com (Package)

Details

Severity HIGH
CVSS Score 8.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE CWE-284
Public Exploit ✅ No
Source NVD
Published 2026-02-27
Updated 2026-08-12
Modified 2026-03-19
Fix URL N/A

Affected Packages

Software From version Fixed in
umbraco.engage.forms 17.0.0 17.1.1
unknown — —

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