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CVE-2026-18678— Kong Mesh: kumactl connects to the control plane without verifying the TLS certificate when no CA is configured

Quick assessment

Affected
Kong Inc. Kong Mesh
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kuma是Kuma组织开源的一个基于 Envoy 的现代化服务网格，可在任何云平台上运行，支持单区域或多区域部署，并兼容 Kubernetes 和虚拟机。 Kuma 2.7.26之前版本、2.8.0至2.9.16之前版本、2.10.0至2.11.14之前版本、2.12.0至2.12.11之前版本和2.13.0至2.13.7之前版本存在加密问题漏洞，该漏洞源于kumactl在未提供CA证书时禁用TLS验证并通过未验证连接发送API令牌，可能导致网络路径上的攻击者拦截用户或管理员API令牌并以该用户身份操作控

CVSS 5.5 · Medium EPSS 0.13% · P2

Affected Version Matrix 5

VendorProduct Version RangeStatus
Kong Inc. Kong Mesh < 2.7.26 affected
2.8.0< 2.9.16 affected
2.10.0< 2.11.14 affected
2.12.0< 2.12.11 affected
2.13.0< 2.13.7 affected
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I. Basic Information for CVE-2026-18678

Vulnerability Information
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Vulnerability Title
Kong Mesh: kumactl connects to the control plane without verifying the TLS certificate when no CA is configured
Source: CVE Program / CVE List V5
Vulnerability Description
When an operator adds an HTTPS control plane profile to kumactl without providing a CA certificate, kumactl disables TLS verification and sends API tokens over the unverified connection. An attacker on the network path between the operator and the control plane can intercept user or admin API tokens and then act against the control plane as that user.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:A/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
证书验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Kuma 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kuma是Kuma组织开源的一个基于 Envoy 的现代化服务网格，可在任何云平台上运行，支持单区域或多区域部署，并兼容 Kubernetes 和虚拟机。 Kuma 2.7.26之前版本、2.8.0至2.9.16之前版本、2.10.0至2.11.14之前版本、2.12.0至2.12.11之前版本和2.13.0至2.13.7之前版本存在加密问题漏洞，该漏洞源于kumactl在未提供CA证书时禁用TLS验证并通过未验证连接发送API令牌，可能导致网络路径上的攻击者拦截用户或管理员API令牌并以该用户身份操作控
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Kong Inc. Kong Mesh 0 ~ 2.7.26 -

II. Public POCs for CVE-2026-18678

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III. Intelligence Information for CVE-2026-18678

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Patches & Fixes for CVE-2026-18678 (2)

Vendor Advisories for CVE-2026-18678 (1)

Same Patch Batch · Kong Inc. · 2026-08-12 · 6 CVEs total

CVE-2026-18677 6.0 MEDIUM Kong Mesh: a dataplane token without a workload binding can claim any workload's SPIFFE id
CVE-2026-18679 5.8 MEDIUM Kong Mesh: kuma-dp connects to the control plane without verifying the TLS certificate whe
CVE-2026-18673 5.3 MEDIUM Kong Mesh: the kuma-dp readiness service exposes the Envoy admin API without authenticatio
CVE-2026-18675 5.3 MEDIUM Kong Mesh: control plane denial of service via a malformed dataplane token with a non-stri
CVE-2026-18676 5.1 MEDIUM Kong Mesh: default control plane config leaks the admin token cross-origin via a CORS wild

IV. Related Vulnerabilities

Same product: Kong Mesh
Same vendor: Kong Inc.
Same weakness: CWE-295

V. Comments for CVE-2026-18678

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