CVE-2026-18678: Kong Inc Kong Mesh

Medium severity, CVSS 5.5. EPSS: 0.1% chance of exploitation in the next 30 days.

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 (fixed in 2.7.26); from 2.8.0, before 2.9.16 (fixed in 2.9.16); from 2.10.0, before 2.11.14 (fixed in 2.11.14); from 2.12.0, before 2.12.11 (fixed in 2.12.11); from 2.13.0, before 2.13.7 (fixed in 2.13.7)

Published 2026-08-12. Last modified 2026-08-31.