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

Quick assessment

Affected
defenseunicorns pepr
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Pepr是Defense Unicorns开源的一个中间件。 Pepr 1.0.5之前版本存在安全漏洞，该漏洞源于默认使用集群管理员RBAC配置且未强制执行最小权限原则。

EPSS 0.25% · P16

Possible ATT&CK Techniques 1 AI

T1098 · Account Manipulation
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I. Basic Information for CVE-2026-23634

Vulnerability Information
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Vulnerability Title
Pepr Overly Permissive RBAC ClusterRole in Admin Mode
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
最小特权原则违背
Source: CVE Program / CVE List V5
Vulnerability Title
Pepr 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Pepr是Defense Unicorns开源的一个中间件。 Pepr 1.0.5之前版本存在安全漏洞，该漏洞源于默认使用集群管理员RBAC配置且未强制执行最小权限原则。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
defenseunicorns pepr < 1.0.5 -

II. Public POCs for CVE-2026-23634

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III. Intelligence Information for CVE-2026-23634

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IV. Related Vulnerabilities

Same vendor: defenseunicorns
Same weakness: CWE-272