Kong Mesh multi-zone: the global control plane attributes KDS-synced resources by an unvalidated in-band zone identifier

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-18674
StatePUBLISHED
AssignerKong
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-17 13:16:51 UTC
Updated2026-08-31 19:22:43 UTC
DescriptionOn 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. The 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. The root cause lives in Kuma's open-source KDS sync code, which Kong Mesh's control plane is built on.

Risk And Classification

Primary CVSS: v4.0 7 HIGH from 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb

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

EPSS: 0.002340000 probability, percentile 0.142020000 (date 2026-09-01)

Problem Types: CWE-345 | CWE-863 | CWE-345 CWE-345 Insufficient Verification of Data Authenticity | CWE-863 CWE-863 Incorrect Authorization

VersionSourceTypeScoreSeverityVector
4.002762ae7-200e-4b20-9b2b-a77d5b8fc4cbSecondary7HIGHCVSS: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/C...
4.0CNACVSS7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:H/VA:N/SC:L/SI:L/SA:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
High
User Interaction
None
Confidentiality
Low
Integrity
High
Availability
None
Sub Conf.
Low
Sub Integrity
Low
Sub Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Kong Inc. Kong Mesh affected 2.7.29 semver Linux
CNA Kong Inc. Kong Mesh affected 2.8.0 2.9.19 semver Linux
CNA Kong Inc. Kong Mesh affected 2.10.0 2.11.18 semver Linux
CNA Kong Inc. Kong Mesh affected 2.12.0 2.12.14 semver Linux
CNA Kong Inc. Kong Mesh affected 2.13.0 2.13.10 semver Linux
CNA Kong Inc. Kong Mesh affected 2.14.0 2.14.2 semver Linux

References

ReferenceSourceLinkTags
github.com/kumahq/kuma/pull/17461 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb github.com
github.com/kumahq/kuma/pull/17458 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb github.com
github.com/kumahq/kuma/security/advisories/GHSA-m58j-fjmc-h3g4 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb github.com
github.com/kumahq/kuma/pull/17456 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb github.com
github.com/kumahq/kuma/pull/17460 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb github.com
github.com/kumahq/kuma/pull/17459 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb github.com
developer.konghq.com/mesh/changelog 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb developer.konghq.com
github.com/kumahq/kuma/pull/17462 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb github.com
github.com/kumahq/kuma/pull/17463 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: johanw (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-08-01T16:58:00.000ZKong Mesh patched releases published

Solutions

CNA: Upgrade to Kong Mesh 2.7.29, 2.9.19, 2.11.18, 2.12.14, 2.13.10 or 2.14.2, whichever matches your release line. In patched versions the global KDS ingest path attributes synced resources by the authenticated connection identity instead of the in-band field.

Workarounds

CNA: Restrict which zones may enroll and protect zone tokens. No configuration flag disables the in-band attribution, so upgrading is the only fix.

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