CVE-2026-23634 Pepr Overly Permissive RBAC ClusterRole in Admin Mode
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-23634?
CVE-2026-23634 is a vulnerability in defenseunicorns pepr, published on 16 Jan 2026.
Official description
Pepr is a type safe K8s middleware. Prior to 1.0.5 , Pepr defaults to a cluster-admin RBAC configuration and does not explicitly force or enforce least-privilege guidance for module authors. The default behavior exists to make the “getting started” experience smooth: new users can experiment with Pepr and create resources dynamically without needing to pre-configure RBAC. This vulnerability is fixed in 1.0.5.
Weakness: CWE-272
Which versions are affected by CVE-2026-23634?
2 open source packages ship an affected version, including pepr. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
pepr npm | All versions | 1.0.5 |
pepr npm | All versions | 1.0.5 |
Products include Defenseunicorns Pepr.
How do I fix CVE-2026-23634?
Upgrade pepr to 1.0.5 or later.
Is CVE-2026-23634 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-23634 exists.
Sources
Also known as GHSA-w54x-r83c-x79q.