CVE-2025-29922 kcp allows unauthorized creation and deletion of objects in arbitrary workspaces through APIExport Virtual Workspace
Attackers can create or delete objects in arbitrary workspaces without proper authorization, bypassing APIBinding requirements in kcp control planes.
- 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-2025-29922?
CVE-2025-29922 is a critical missing authorization vulnerability in kcp-dev kcp, published on 20 Mar 2025. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
kcp is a Kubernetes-like control plane for form-factors and use-cases beyond Kubernetes and container workloads. Prior to 0.26.3, the identified vulnerability allows creating or deleting an object via the APIExport VirtualWorkspace in any arbitrary target workspace for pre-existing resources. By design, this should only be allowed when the workspace owner decides to give access to an API provider by creating an APIBinding. With this vulnerability, it is possible for an attacker to create and delete objects even if none of these requirements are satisfied, i.e. even if there is no APIBinding in that workspace at all or the workspace owner has created an APIBinding, but rejected a permission claim. A fix for this issue has been identified and has been published with kcp 0.26.3 and 0.27.0.
Weakness: CWE-285
Which versions are affected by CVE-2025-29922?
3 open source packages ship an affected version, including github.com/kcp-dev/kcp.
| Package | Affected | Fixed in |
|---|---|---|
github.com/kcp-dev/kcp Go | All versions | 0.26.3 |
github.com/kcp-dev/kcp Go | All versions | 0.26.3 |
github.com/kcp-dev/kcp Go | All versions | 0.26.3 |
How do I fix CVE-2025-29922?
Upgrade github.com/kcp-dev/kcp to 0.26.3 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2025-29922 being exploited?
There is no known exploitation of CVE-2025-29922 in the wild and no public exploit code.
Sources
Also known as GHSA-w2rr-38wv-8rrp, GO-2025-3538.