Authorization Flaw in Unleash Feature Management Platform
CVE-2026-76910

5.3MEDIUM

Key Information:

Vendor

Unleash

Status
Unleash
Vendor
CVE Published:
22 September 2026

What is CVE-2026-76910?

Unleash, an open-source feature management platform, had a notable authorization flaw in its prior versions. Specifically, before version 8.0.3, the cloneFeatureToggle function and the API endpoint POST /api/admin/projects/:projectId/features/:featureName/clone permitted the creation of features in the destination project without properly verifying access to the source project. This oversight enabled users with clone permissions to replicate features by guessing the globally unique feature names of other projects, allowing them to view sensitive information such as strategy parameters, constraints, and variant payloads. The vulnerability was addressed in version 8.0.3.

Affected Version(s)

unleash < 8.0.3

References

https://github.com/Unleash/unleash/security/advisories/GH...
x_refsource_CONFIRM
https://github.com/Unleash/unleash/commit/2dc6ac0e8ba524e...
x_refsource_MISC
https://github.com/Unleash/unleash/releases/tag/v8.0.3
x_refsource_MISC

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.