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CVE PROGRAM SOURCE RECORD5.1 Medium

CVE-2026-45021

Kuma: Default kuma-cp leaks admin token cross-origin via CORS wildcard + LocalhostIsAdmin

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

Kuma is a modern Envoy-based service mesh that can run on every cloud across both Kubernetes and VMs. Prior to 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5, the default kuma-cp config leaks the admin bootstrap token and signing keys to any webpage the operator visits while the control plane is reachable from their browser. CorsAllowedDomains: [".*"] reflects any Origin, and LocalhostIsAdmin: true promotes requests from 127.0.0.1 to mesh-system:admin. A cross-origin fetch() from a malicious page returns the admin JWT and signing material. This vulnerability is fixed in 2.7.25, 2.9.15, 2.11.13, 2.12.10, and 2.13.5.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

kumahq kuma

  • < 2.7.25affected
  • >= 2.9.0, < 2.9.15affected
  • >= 2.11.0, < 2.11.13affected
  • >= 2.12.0, < 2.12.10affected
  • >= 2.13.0, < 2.13.5affected

References