{"id":"CVE-2026-18674","aliases":["EUVD-2026-60160","GHSA-fxcr-qwx6-5h7q","GHSA-m58j-fjmc-h3g4"],"status":"published","title":"Kong Mesh multi-zone: the global control plane attributes KDS-synced resources by an unvalidated in-band zone identifier","description":"On a Kong Mesh global control plane, resources received over the zone-to-global KDS sync are attributed using the in-band, sender-controlled ControlPlane.Identifier rather than the authenticated zone identity derived from the connection. Authenticated zones can have the global control plane store and re-distribute those resources as belonging to another zone.\n\n\n\nThe result is a cross-zone isolation bypass: the holder of a single enrolled zone's credential can inject, attribute, and overwrite resources in another zone's namespace mesh-wide.\n\n\n\n\nThe root cause lives in Kuma's open-source KDS sync code, which Kong Mesh's control plane is built on.","severity":{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:N/SC:L/SI:L/SA:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00558,"percentile":0.46817,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-345","CWE-863"],"published":"2026-08-17T12:08:11Z","modified":"2026-10-28T02:30:55Z","products":[{"vendor":"kong inc.","product":"kong mesh"}],"references":[{"url":"https://github.com/kumahq/kuma/security/advisories/GHSA-m58j-fjmc-h3g4","tags":["vendor-advisory","advisory"]},{"url":"https://github.com/kumahq/kuma/pull/17456","tags":["patch","fix"]},{"url":"https://github.com/kumahq/kuma/pull/17458","tags":["patch","fix"]},{"url":"https://github.com/kumahq/kuma/pull/17461","tags":["patch","fix"]},{"url":"https://github.com/kumahq/kuma/pull/17463","tags":["patch","fix"]},{"url":"https://github.com/kumahq/kuma/pull/17462","tags":["patch","fix"]},{"url":"https://github.com/kumahq/kuma/pull/17460","tags":["patch","fix"]},{"url":"https://github.com/kumahq/kuma/pull/17459","tags":["patch","fix"]},{"url":"https://developer.konghq.com/mesh/changelog/","tags":["release-notes","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-18674","tags":["advisory"]},{"url":"https://developer.konghq.com/mesh/changelog"},{"url":"https://github.com/advisories/GHSA-fxcr-qwx6-5h7q"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18674.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-18674","title":"Kong Mesh multi-zone: the global control plane attributes KDS-synced resources by an unvalidated in-band zone identifier","description":"On a Kong Mesh global control plane, resources received over the zone-to-global KDS sync are attributed using the in-band, sender-controlled ControlPlane.Identifier rather than the authenticated zone identity derived from the connection. Authenticated zones can have the global control plane store and re-distribute those resources as belonging to another zone.\n\n\n\nThe result is a cross-zone isolation bypass: the holder of a single enrolled zone's credential can inject, attribute, and overwrite resources in another zone's namespace mesh-wide.\n\n\n\n\nThe root cause lives in Kuma's open-source KDS sync code, which Kong Mesh's control plane is built on.","status":"published","published":"2026-08-17T12:08:11.47Z","modified":"2026-08-17T14:46:48.378Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:N/SC:L/SI:L/SA:N","level":"high","assessor":"cna"}],"cwes":["CWE-345","CWE-863"],"updated_at":"2026-11-02T14:20:12.260247Z"}],"euvd":[{"id":"EUVD-2026-60160","description":"On a Kong Mesh global control plane, resources received over the zone-to-global KDS sync are attributed using the in-band, sender-controlled ControlPlane.Identifier rather than the authenticated zone identity derived from the connection. Authenticated zones can have the global control plane store and re-distribute those resources as belonging to another zone.\n\n\n\nThe result is a cross-zone isolation bypass: the holder of a single enrolled zone's credential can inject, attribute, and overwrite resources in another zone's namespace mesh-wide.\n\n\n\n\nThe root cause lives in Kuma's open-source KDS sync code, which Kong Mesh's control plane is built on.","status":"published","published":"2026-08-17T12:08:11Z","modified":"2026-08-17T14:46:48Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:N/SC:L/SI:L/SA:N","level":"high"}],"updated_at":"2026-11-02T18:01:49.335011Z"}],"ghsa":[{"id":"GHSA-fxcr-qwx6-5h7q","title":"On a Kong Mesh global control plane, resources received over the zone-to-global KDS sync are...","description":"On a Kong Mesh global control plane, resources received over the zone-to-global KDS sync are attributed using the in-band, sender-controlled ControlPlane.Identifier rather than the authenticated zone identity derived from the connection. Authenticated zones can have the global control plane store and re-distribute those resources as belonging to another zone.\n\n\n\nThe result is a cross-zone isolation bypass: the holder of a single enrolled zone's credential can inject, attribute, and overwrite resources in another zone's namespace mesh-wide.\n\n\n\n\nThe root cause lives in Kuma's open-source KDS sync code, which Kong Mesh's control plane is built on.","status":"published","published":"2026-08-17T15:30:38Z","modified":"2026-08-17T15:30:43Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:N/SC:L/SI:L/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":"high"}],"cwes":["CWE-345"],"updated_at":"2026-11-02T15:10:34.652326Z"}],"nvd":[{"id":"CVE-2026-18674","description":"On a Kong Mesh global control plane, resources received over the zone-to-global KDS sync are attributed using the in-band, sender-controlled ControlPlane.Identifier rather than the authenticated zone identity derived from the connection. Authenticated zones can have the global control plane store and re-distribute those resources as belonging to another zone.\n\n\n\nThe result is a cross-zone isolation bypass: the holder of a single enrolled zone's credential can inject, attribute, and overwrite resources in another zone's namespace mesh-wide.\n\n\n\n\nThe root cause lives in Kuma's open-source KDS sync code, which Kong Mesh's control plane is built on.","status":"published","published":"2026-08-17T13:16:51.82Z","modified":"2026-08-31T19:22:43.473Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:N/SC:L/SI:L/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":"high","assessor":"secondary"}],"cwes":["CWE-345","CWE-863"],"updated_at":"2026-11-02T14:12:38.647684Z"}],"osv":[{"id":"CVE-2026-18674","title":"Kong Mesh multi-zone: the global control plane attributes KDS-synced resources by an unvalidated in-band zone identifier","description":"On a Kong Mesh global control plane, resources received over the zone-to-global KDS sync are attributed using the in-band, sender-controlled ControlPlane.Identifier rather than the authenticated zone identity derived from the connection. Authenticated zones can have the global control plane store and re-distribute those resources as belonging to another zone.\n\n\n\nThe result is a cross-zone isolation bypass: the holder of a single enrolled zone's credential can inject, attribute, and overwrite resources in another zone's namespace mesh-wide.\n\n\n\n\nThe root cause lives in Kuma's open-source KDS sync code, which Kong Mesh's control plane is built on.","status":"published","published":"2026-08-17T12:08:11.47Z","modified":"2026-10-28T02:30:55.273396912Z","cvss":[{"version":"4.0","score":7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:N/SC:L/SI:L/SA:N","level":"high"}],"cwes":["CWE-345","CWE-863"],"updated_at":"2026-11-02T15:44:58.024074Z"}]}}