kuma-dp connects to control plane without verifying TLS certificate when no CA is configured
Summary
| CVE | CVE-2026-52724 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-15 15:17:17 UTC |
| Updated | 2026-09-30 17:43:24 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 5.8 MEDIUM from [email protected]
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
EPSS: 0.003500000 probability, percentile 0.263550000 (date 2026-10-03)
Problem Types: CWE-295 | CWE-295 CWE-295: Improper Certificate Validation
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 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/E:X/C... |
| 4.0 | CNA | DECLARED | 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 |
CVSS v4.0 Breakdown
Attack Vector
AdjacentAttack Complexity
HighAttack Requirements
PresentPrivileges Required
NoneUser Interaction
NoneConfidentiality
NoneIntegrity
NoneAvailability
NoneSub Conf.
HighSub Integrity
HighSub Availability
HighCVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Kumahq | Kuma | affected < 2.7.26 | Not specified |
| CNA | Kumahq | Kuma | affected >= 2.8.0, < 2.9.16 | Not specified |
| CNA | Kumahq | Kuma | affected >= 2.10.0, < 2.11.14 | Not specified |
| CNA | Kumahq | Kuma | affected >= 2.12.0, < 2.12.11 | Not specified |
| CNA | Kumahq | Kuma | affected >= 2.13.0, < 2.13.7 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/kumahq/kuma/commit/bb56ae628753aaec1f7846a514ab4edc35c0b569 | [email protected] | github.com | |
| github.com/kumahq/kuma/commit/d4ae0c0151596be991897651f20c5cdf32de1980 | [email protected] | github.com | |
| github.com/kumahq/kuma/commit/2d0fb382924598f8746bc85c896f50384675940f | [email protected] | github.com | |
| github.com/kumahq/kuma/commit/85716397ffa404234bf365da0967eca0b0fa1870 | [email protected] | github.com | |
| github.com/kumahq/kuma/commit/a256af4869ae7e0ebbc2a14dc231e04ac8df1ba3 | [email protected] | github.com | |
| github.com/kumahq/kuma/commit/eb81494c2c7a5536e55c19cdde51b02a03b51e11 | [email protected] | github.com | |
| github.com/kumahq/kuma/security/advisories/GHSA-wvmp-6r4v-j6cv | [email protected] | github.com | |
| github.com/kumahq/kuma/pull/16777 | [email protected] | github.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.