Vulnerability · Published Jan 16, 2026 · Assigned by GitHub_M

CVE-2026-23634Pepr Overly Permissive RBAC ClusterRole in Admin Mode

None 0.0

In plain English

A security flaw in pepr from defenseunicorns. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)0.0None

Exploit odds (30 days)0.2%top 84.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	pepr	1.0.5	GHSA-w54x-r83c-x79q

Affected products (as reported)

Vendor	Product	Versions
defenseunicorns	pepr	< 1.0.5

Weakness: CWE-272 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N

References

https://github.com/defenseunicorns/pepr/security/advisories/GHSA-w54x-r83c-x79q x_refsource_CONFIRM
https://github.com/defenseunicorns/pepr/releases/tag/v1.0.5 x_refsource_MISC