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CVE-2026-18677— Kong Mesh: a dataplane token without a workload binding can claim any workload's SPIFFE identity

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 2.13.0版本至2.13.10之前版本和2.14.0版本至2.14.2之前版本存在授权问题漏洞，该漏洞源于kuma-cp中的XDS认证器仅在数据平面令牌绑定到工作负载时才验证kuma.io/workload标签，且工作负载绑定是可选的，导致提供标签绑定令牌的数据平面可将kuma.io/workload设置为任意值，获取其他工作负载的SPIF

CVSS 6.0 · Medium EPSS 0.43% · P35

Affected Version Matrix 2

VendorProduct Version RangeStatus
Kong Inc. Kong Mesh 2.13.0< 2.13.10 affected
2.14.0< 2.14.2 affected
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I. Basic Information for CVE-2026-18677

Vulnerability Information
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Vulnerability Title
Kong Mesh: a dataplane token without a workload binding can claim any workload's SPIFFE identity
Source: CVE Program / CVE List V5
Vulnerability Description
In Kong Mesh running in universal mode with a MeshIdentity whose SPIFFE ID path template derives from the dataplane's kuma.io/workload label, the XDS authenticator in kuma-cp validates that label only when the dataplane token is bound to a workload. Workload binding is optional, so a dataplane presenting a tags-bound token can register with kuma.io/workload set to any value and obtain another workload's SPIFFE identity.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Kuma 授权问题漏洞
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 2.13.0版本至2.13.10之前版本和2.14.0版本至2.14.2之前版本存在授权问题漏洞，该漏洞源于kuma-cp中的XDS认证器仅在数据平面令牌绑定到工作负载时才验证kuma.io/workload标签，且工作负载绑定是可选的，导致提供标签绑定令牌的数据平面可将kuma.io/workload设置为任意值，获取其他工作负载的SPIF
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 2.13.0 ~ 2.13.10 -

II. Public POCs for CVE-2026-18677

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III. Intelligence Information for CVE-2026-18677

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Patches & Fixes for CVE-2026-18677 (4)

Vendor Advisories for CVE-2026-18677 (1)

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

CVE-2026-18679 5.8 MEDIUM Kong Mesh: kuma-dp connects to the control plane without verifying the TLS certificate whe
CVE-2026-18678 5.5 MEDIUM Kong Mesh: kumactl 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-290

V. Comments for CVE-2026-18677

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