CVE-2026-52724
kuma-dp connects to control plane without verifying TLS certificate when no CA is configured
- State
- Published
- Severity
- 5.8 Medium
- Published
- Sep 15, 2026
- Updated
- Sep 15, 2026
- Reserved
- Jun 8, 2026
Description
Kuma is a modern Envoy-based service mesh that can run on every cloud across both Kubernetes and VMs. Prior to 2.7.26, 2.9.16, 2.11.14, 2.12.11, and 2.13.7, Universal mode kuma-dp connections to an HTTPS control plane disable TLS peer verification when --ca-cert-file is not supplied and KUMA_CONTROL_PLANE_CA_CERT is unset. The dataplane authentication token is sent over the unverified connection, allowing an on-path attacker to intercept the token, impersonate the control plane, inject a forged bootstrap configuration, and take over the proxy. Standard Kubernetes installations created by kumactl install control-plane or the official Helm chart are unaffected because the mutating admission webhook injects KUMA_CONTROL_PLANE_CA_CERT into each sidecar. This issue is fixed in versions 2.7.26, 2.9.16, 2.11.14, 2.12.11, and 2.13.7.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.8 Medium | CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H | GitHub_M |
Weaknesses
- CWE-295 Improper Certificate Validation
Affected Products
| Product | Versions |
|---|---|
kumakumahq |
|
References
- https://github.com/kumahq/kuma/security/advisories/GHSA-wvmp-6r4v-j6cv
- https://github.com/kumahq/kuma/pull/16777
- https://github.com/kumahq/kuma/commit/2d0fb382924598f8746bc85c896f50384675940f
- https://github.com/kumahq/kuma/commit/85716397ffa404234bf365da0967eca0b0fa1870
- https://github.com/kumahq/kuma/commit/a256af4869ae7e0ebbc2a14dc231e04ac8df1ba3
- https://github.com/kumahq/kuma/commit/bb56ae628753aaec1f7846a514ab4edc35c0b569
- https://github.com/kumahq/kuma/commit/d4ae0c0151596be991897651f20c5cdf32de1980
- https://github.com/kumahq/kuma/commit/eb81494c2c7a5536e55c19cdde51b02a03b51e11
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