CVE-2026-18677

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.

Published 12 Aug 2026, 19:17 UTC Last modified 12 Aug 2026, 19:17 UTC

6.0

CVSS 4.0 MEDIUM base score

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/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

Attack profile

The conditions required to exploit this vulnerability and its potential impact.

Attack vector Network

Attack complexity Low

Privileges required Low

User interaction None

Scope Not assessed

Confidentiality Not assessed

Integrity Not assessed

Availability Not assessed

Affected products

Product applicability statements supplied with the NVD record.

NVD has not published structured affected-product data for this record.

Weakness classification

CWE categories help security teams group the underlying software weakness.

CWECWE-290

Source references

External advisories, patches and technical reports attached to this CVE record.

NVD National Vulnerability Database recordnvd.nist.gov 01 Technical reference 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb 02 Technical reference 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb 03 Technical reference 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb 04 Technical reference 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb 05 Technical reference 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb