CVE-2026-45021

Summary

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 Software

VendorProductVersion RangeStatus
kumahqkuma< 2.7.25affected
kumahqkuma>= 2.9.0, < 2.9.15affected
kumahqkuma>= 2.11.0, < 2.11.13affected
kumahqkuma>= 2.12.0, < 2.12.10affected
kumahqkuma>= 2.13.0, < 2.13.5affected

Weaknesses

  • CWE-346: CWE-346: Origin Validation Error
  • CWE-942: CWE-942: Permissive Cross-domain Policy with Untrusted Domains

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References