What’s Vulnerable › Vulnerabilities

CVE-2026-18678: Kong Mesh: kumactl connects to the control plane without verifying the TLS certificate when no CA is configured

• Severity: medium (CVSS 5.5 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-12 · updated 2026-10-23
• Weakness: CWE-295

Description

When an operator adds an HTTPS control plane profile to kumactl without providing a CA certificate, kumactl disables TLS verification and sends API tokens over the unverified connection. An attacker on the network path between the operator and the control plane can intercept user or admin API tokens and then act against the control plane as that user.

Affected products

• Kong Inc. Kong Mesh: before 2.7.26; from 2.8.0 before 2.9.16; from 2.10.0 before 2.11.14; from 2.12.0 before 2.12.11; from 2.13.0 before 2.13.7 — fixed in 2.11.14, 2.12.11, 2.13.7, 2.7.26, 2.9.16

How to fix

Upgrade to a fixed version: Kong Inc. Kong Mesh 2.11.14, 2.12.11, 2.13.7, 2.7.26. Check the vendor advisory for mitigations.

References

• https://developer.konghq.com/mesh/changelog/
• https://github.com/kumahq/kuma/pull/16777
• https://github.com/kumahq/kuma/security/advisories/GHSA-v95x-xhq5-4929

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