CVE-2026-45021
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.
- CVSS 4.0
- 5.1
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N - EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 10% of CVEs (scores of 2026-10-25)
- CWEs
- CWE-346, CWE-942
- Published
- Modified
- Record from
- the NVD, synced
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-3vcp-chfh-f6r2 | Go | github.com/kumahq/kuma | <2.7.25 | 2.7.25 |
| GHSA-3vcp-chfh-f6r2 | Go | github.com/kumahq/kuma | >=2.9.0 <2.9.15 | 2.9.15 |
| GHSA-3vcp-chfh-f6r2 | Go | github.com/kumahq/kuma | >=2.11.0 <2.11.13 | 2.11.13 |
| GHSA-3vcp-chfh-f6r2 | Go | github.com/kumahq/kuma | >=2.12.0 <2.12.10 | 2.12.10 |
| GHSA-3vcp-chfh-f6r2 | Go | github.com/kumahq/kuma | >=2.13.0 <2.13.5 | 2.13.5 |
| GO-2026-5102 | Go | github.com/kumahq/kuma | all versions | no fix published |
| GO-2026-5102 | Go | github.com/kumahq/kuma/v2 | <2.7.25 >=2.9.13 <2.11.13 >=2.12.4 <2.12.10 >=2.13.0 <2.13.5 | 2.7.25, 2.11.13, 2.12.10, 2.13.5 |