6.3 Medium

Kubewarden policies is a collection of WebAssembly policies for securing and governing Kubernetes clusters.

CVE-2026-63121

Kubewarden policies is a collection of WebAssembly policies for securing and governing Kubernetes clusters. For versions provisionally classified as affected before 2.1.2, trusted-repos-policy compares an image's registry hostname against reject lists and allow lists case-sensitively even though registry DNS names are case-insensitive. An image with an uppercase or mixed-case registry hostname can miss a rejection rule for the equivalent lowercase host, so the admission policy accepts a resource whose container runtime pulls the same prohibited image. Only reject-list configurations have this bypass: allow-list configurations fail closed by over-denying differently cased hostnames. The security consequences depend on the configured rejection policy and deployment environment. This issue is fixed in version 2.1.2.

Assessment

CVSS: 6.3 (v3.1)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 30 October 2026
Last updated: 30 October 2026
Affected: kubewarden
Assigner: GitHub_M

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

At the source

EUVD (ENISA)

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