CVE-2026-18679: CWE-295 Improper Certificate Validation in Kong Inc. Kong Mesh
CVE-2026-18679 is a vulnerability in Kong Inc.'s Kong Mesh where the data plane component (kuma-dp) disables TLS peer verification if a CA certificate is not provided by the operator. This causes the dataplane authentication token to be sent over an unverified connection, allowing an on-path attacker to intercept the token and impersonate the control plane, potentially injecting malicious configuration and taking control of the proxy.
AI Analysis
Technical Summary
The vulnerability arises when kuma-dp connects to an HTTPS control plane without a CA certificate configured, resulting in TLS peer verification being disabled. Consequently, the dataplane authentication token is transmitted over an unverified TLS connection. An attacker positioned on the network path can intercept this token and impersonate the control plane to the data plane, enabling injection of forged bootstrap configurations and takeover of the proxy component.
Potential Impact
An attacker with network access between the data plane and control plane can intercept sensitive authentication tokens and impersonate the control plane. This allows the attacker to inject malicious configurations into the data plane proxy, effectively taking control of it. The vulnerability compromises the integrity and authenticity of the communication channel between control and data planes.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix or workaround is provided, operators should ensure that a valid CA certificate is always supplied when starting kuma-dp against an HTTPS control plane to avoid disabling TLS peer verification.
CVE-2026-18679: CWE-295 Improper Certificate Validation in Kong Inc. Kong Mesh
Description
CVE-2026-18679 is a vulnerability in Kong Inc.'s Kong Mesh where the data plane component (kuma-dp) disables TLS peer verification if a CA certificate is not provided by the operator. This causes the dataplane authentication token to be sent over an unverified connection, allowing an on-path attacker to intercept the token and impersonate the control plane, potentially injecting malicious configuration and taking control of the proxy.
CVSS v4.0
Score 5.8medium
Affected software
pkg:github/kumahq/kumaRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability arises when kuma-dp connects to an HTTPS control plane without a CA certificate configured, resulting in TLS peer verification being disabled. Consequently, the dataplane authentication token is transmitted over an unverified TLS connection. An attacker positioned on the network path can intercept this token and impersonate the control plane to the data plane, enabling injection of forged bootstrap configurations and takeover of the proxy component.
Potential Impact
An attacker with network access between the data plane and control plane can intercept sensitive authentication tokens and impersonate the control plane. This allows the attacker to inject malicious configurations into the data plane proxy, effectively taking control of it. The vulnerability compromises the integrity and authenticity of the communication channel between control and data planes.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix or workaround is provided, operators should ensure that a valid CA certificate is always supplied when starting kuma-dp against an HTTPS control plane to avoid disabling TLS peer verification.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Kong
- Date Reserved
- 2026-08-03T15:20:48.055Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7cc907bf8831d5390770ee
Added to database: 08/12/2026, 19:27:03 UTC
Last enriched: 08/12/2026, 19:58:11 UTC
Last updated: 08/12/2026, 23:21:12 UTC
Views: 2
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