CVE-2026-18676Kong Mesh: default control plane config leaks the admin token cross-origin via a CORS wildcard and localhost admin
Updated under an hour ago ()
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It affects Kong Inc. Kong Mesh. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
The default kuma-cp configuration in Kong Mesh reveals the admin bootstrap token and signing keys to any webpage the operator visits while the control plane is reachable from their browser. Due to a CORS misconfiguration a cross-origin fetch() from a malicious page returns the admin JWT and signing material.
- CVSS
- 5.1 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-346, CWE-942
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Kong
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Kong Inc. Kong Mesh kong:mesh (from the name) | before 2.7.25; from 2.8.0 before 2.9.15; from 2.10.0 before 2.11.13; from 2.12.0 before 2.12.10; from 2.13.0 before 2.13.5 | CNA record |
References
- https://github.com/kumahq/kuma/security/advisories/GHSA-3vcp-chfh-f6r2vendor-advisory
- https://github.com/kumahq/kuma/pull/16416patch
- https://github.com/kumahq/kuma/pull/16423patch
- https://github.com/kumahq/kuma/pull/16424patch
- https://github.com/kumahq/kuma/pull/16425patch
- https://github.com/kumahq/kuma/pull/16426patch
- https://github.com/kumahq/kuma/pull/16427patch
- https://developer.konghq.com/mesh/changelog/release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.