Case-Sensitivity Issue in Kubewarden's Trusted Repos Policy for Kubernetes
CVE-2026-63121

6.3MEDIUM

Key Information:

Vendor

Kubewarden

Status
Policies
Vendor
CVE Published:
30 October 2026

What is CVE-2026-63121?

A vulnerability has been identified in the trusted-repos-policy of Kubewarden which impacts how images are validated against rejection lists. Versions prior to 2.1.2 implement case-sensitive comparisons for registry hostnames, conflicting with the case-insensitive nature of DNS names. This discrepancy allows images with uppercase or mixed-case hostnames to bypass rejection rules, enabling the deployment of images that should be restricted. It is crucial to understand the implications of this flaw depending on the configured rejection policies and deployment conditions. The issue is mitigated in version 2.1.2.

Affected Version(s)

policies < 2.1.2

References

https://github.com/kubewarden/policies/security/advisorie...
x_refsource_CONFIRM
https://github.com/kubewarden/policies/commit/bc5597fcbbb...
x_refsource_MISC
https://github.com/kubewarden/policies/tree/trusted-repos...
x_refsource_MISC

CVSS V3.1

Score:
6.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.