CVE-2026-18674
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. 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.
INFO
Published Date :
Aug. 17, 2026, 1:16 p.m.
Last Modified :
Aug. 17, 2026, 3:16 p.m.
Remotely Exploit :
Yes !
Source :
02762ae7-200e-4b20-9b2b-a77d5b8fc4cb
Affected Products
The following products are affected by CVE-2026-18674
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 4.0 | HIGH | 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb | ||||
| CVSS 4.0 | HIGH | 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb |
Solution
- Update Kong Mesh to the latest version.
- Verify zone resource attribution after update.
- Review Kuma KDS sync code for patches.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-18674.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-18674 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-18674
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-18674 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-18674 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-18674', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-17T14:46:37.265087Z'} -
New CVE Received by 02762ae7-200e-4b20-9b2b-a77d5b8fc4cb
Aug. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'Kong Inc.', 'modules': ['kuma-cp'], 'product': 'Kong Mesh', 'versions': [{'status': 'affected', 'version': '0', 'lessThan': '2.7.29', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.8.0', 'lessThan': '2.9.19', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.10.0', 'lessThan': '2.11.18', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.12.0', 'lessThan': '2.12.14', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.13.0', 'lessThan': '2.13.10', 'versionType': 'semver'}, {'status': 'affected', 'version': '2.14.0', 'lessThan': '2.14.2', 'versionType': 'semver'}], 'platforms': ['Linux'], 'defaultStatus': 'unaffected'}] Added 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. 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. Added CVSS V4.0 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 Added CWE CWE-345 Added CWE CWE-863 Added Reference https://developer.konghq.com/mesh/changelog/ Added Reference https://github.com/kumahq/kuma/pull/17456 Added Reference https://github.com/kumahq/kuma/pull/17458 Added Reference https://github.com/kumahq/kuma/pull/17459 Added Reference https://github.com/kumahq/kuma/pull/17460 Added Reference https://github.com/kumahq/kuma/pull/17461 Added Reference https://github.com/kumahq/kuma/pull/17462 Added Reference https://github.com/kumahq/kuma/pull/17463 Added Reference https://github.com/kumahq/kuma/security/advisories/GHSA-m58j-fjmc-h3g4