CVE-2026-77425 Unleash: A project member can reorder activation strategies belonging to any other project / environment (cross-project integrity write), bypassing project RBAC and the audit log
An authenticated user can reorder feature strategies in other projects, bypassing RBAC and audit logs, affecting Unleash deployments.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-77425?
CVE-2026-77425 is a medium-severity missing authorization vulnerability in unleash, published on 22 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Unleash is an open-source feature management platform. Prior to 8.0.3, POST /api/admin/projects/:projectId/features/:featureName/environments/:environment/strategies/set-sort-order passes attacker-controlled strategy IDs to unprotectedUpdateStrategiesSortOrder and updateSortOrder without verifying that the IDs belong to the project, feature, and environment authorized by the URL. In a multi-project Pro or Enterprise deployment, an authenticated user with UPDATE_FEATURE_STRATEGY in one project who knows another project's strategy IDs can reorder those strategies, changing feature evaluation precedence while the operation is attributed to the attacker's URL context rather than the affected project. The single-project OSS edition lacks the cross-project dimension, although the missing context binding still permits unauthorized reordering across features or environments in the default project. The endpoint changes only sort_order and does not modify strategy parameters, constraints, or segments. This issue is fixed in version 8.0.3.
Which versions are affected by CVE-2026-77425?
2 open source packages ship an affected version, including unleash-server.
| Package | Affected | Fixed in |
|---|---|---|
unleash-server npm | All versions | 8.0.3 |
unleash-server npm | All versions | 8.0.3 |
How do I fix CVE-2026-77425?
Upgrade unleash-server to 8.0.3 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-77425 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-77425 exists.
Sources
Also known as GHSA-5ffh-6f9q-5hhr, MINI-vxjc-8pxf-ww8v.