{"id":"CVE-2026-18677","aliases":["EUVD-2026-57424","GHSA-6p7w-xxw9-j47f","GHSA-744g-c785-x65q"],"status":"published","title":"Kong Mesh: a dataplane token without a workload binding can claim any workload's SPIFFE identity","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.","severity":{"version":"4.0","score":6,"vector":"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","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00583,"percentile":0.48217,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-290"],"published":"2026-08-12T18:47:06Z","modified":"2026-10-28T02:30:54Z","products":[{"vendor":"kong inc.","product":"kong mesh"}],"references":[{"url":"https://github.com/kumahq/kuma/security/advisories/GHSA-744g-c785-x65q","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/kumahq/kuma/pull/17474","tags":["patch","fix"]},{"url":"https://github.com/kumahq/kuma/pull/17503","tags":["patch","fix"]},{"url":"https://github.com/kumahq/kuma/pull/17502","tags":["patch","fix"]},{"url":"https://developer.konghq.com/mesh/changelog/","tags":["release-notes","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18677","tags":["advisory"]},{"url":"https://developer.konghq.com/mesh/changelog"},{"url":"https://github.com/advisories/GHSA-6p7w-xxw9-j47f"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18677.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-18677","title":"Kong Mesh: a dataplane token without a workload binding can claim any workload's SPIFFE identity","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.","status":"published","published":"2026-08-12T18:47:06.71Z","modified":"2026-08-13T14:49:27.614Z","cvss":[{"version":"4.0","score":6,"vector":"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","level":"medium","assessor":"cna"}],"cwes":["CWE-290"],"updated_at":"2026-11-02T14:20:12.60856Z"}],"euvd":[{"id":"EUVD-2026-57424","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.","status":"published","published":"2026-08-12T18:47:06Z","modified":"2026-08-13T14:49:27Z","cvss":[{"version":"4.0","score":6,"vector":"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","level":"medium"}],"updated_at":"2026-11-02T18:01:56.415282Z"}],"ghsa":[{"id":"GHSA-6p7w-xxw9-j47f","title":"In Kong Mesh running in universal mode with a MeshIdentity whose SPIFFE ID path template derives...","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.","status":"published","published":"2026-08-12T21:31:39Z","modified":"2026-08-12T21:31:39Z","cvss":[{"version":"4.0","score":6,"vector":"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","level":"medium"}],"cwes":["CWE-290"],"updated_at":"2026-11-02T15:10:23.958572Z"}],"nvd":[{"id":"CVE-2026-18677","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.","status":"published","published":"2026-08-12T19:17:31.063Z","modified":"2026-10-23T19:10:00.167Z","cvss":[{"version":"4.0","score":6,"vector":"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","level":"medium","assessor":"secondary"}],"cwes":["CWE-290"],"updated_at":"2026-11-02T14:12:37.217486Z"}],"osv":[{"id":"CVE-2026-18677","title":"Kong Mesh: a dataplane token without a workload binding can claim any workload's SPIFFE identity","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.","status":"published","published":"2026-08-12T18:47:06.71Z","modified":"2026-10-28T02:30:54.239574086Z","cvss":[{"version":"4.0","score":6,"vector":"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","level":"medium"}],"cwes":["CWE-290"],"updated_at":"2026-11-02T15:44:58.024074Z"}]}}