Kong Mesh up to 2.14.1 Dataplane Token Validator assertion

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Kong Mesh up to 2.14.1. Affected by this issue is some unknown functionality of the component Dataplane Token Validator. The manipulation leads to assertion. This vulnerability is traded as CVE-2026-18675. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Kong Mesh up to 2.14.1. It has been rated as problematic. This issue affects an unknown functionality of the component Dataplane Token Validator. The manipulation with an unknown input leads to a assertion vulnerability. Using CWE to declare the problem leads to CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. Impacted is availability. The summary by CVE is:

The dataplane token validator in kuma-cp performs an unchecked Go type assertion on the JWT kid header. A token whose kid is a JSON number decodes as a float64 and triggers a runtime panic before any signature, claims, or authorization check runs. The panic terminates the entire kuma-cp process, HTTP API, the health and readiness endpoints, and xDS. Unauthenticated access to the dataplane gRPC server can trigger the crash with a malformed token A single request is a transient interruption; sustaining an outage requires repeated requests.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-18675 since 08/03/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 2.7.29, 2.9.19, 2.11.18, 2.12.14, 2.13.10 or 2.14.2 eliminates this vulnerability.

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Productinfo

Vendor

• Kong

Name

• Mesh

Version

• 2.7.0
• 2.7.1
• 2.7.2
• 2.7.3
• 2.7.4
• 2.7.5
• 2.7.6
• 2.7.7
• 2.7.8
• 2.7.9
• 2.7.10
• 2.7.11
• 2.7.12
• 2.7.13
• 2.7.14
• 2.7.15
• 2.7.16
• 2.7.17
• 2.7.18
• 2.7.19
• 2.7.20
• 2.7.21
• 2.7.22
• 2.7.23
• 2.7.24
• 2.7.25
• 2.7.26
• 2.7.27
• 2.7.28
• 2.9.0
• 2.9.1
• 2.9.2
• 2.9.3
• 2.9.4
• 2.9.5
• 2.9.6
• 2.9.7
• 2.9.8
• 2.9.9
• 2.9.10
• 2.9.11
• 2.9.12
• 2.9.13
• 2.9.14
• 2.9.15
• 2.9.16
• 2.9.17
• 2.9.18
• 2.11.0
• 2.11.1
• 2.11.2
• 2.11.3
• 2.11.4
• 2.11.5
• 2.11.6
• 2.11.7
• 2.11.8
• 2.11.9
• 2.11.10
• 2.11.11
• 2.11.12
• 2.11.13
• 2.11.14
• 2.11.15
• 2.11.16
• 2.11.17
• 2.12.0
• 2.12.1
• 2.12.2
• 2.12.3
• 2.12.4
• 2.12.5
• 2.12.6
• 2.12.7
• 2.12.8
• 2.12.9
• 2.12.10
• 2.12.11
• 2.12.12
• 2.12.13
• 2.13.0
• 2.13.1
• 2.13.2
• 2.13.3
• 2.13.4
• 2.13.5
• 2.13.6
• 2.13.7
• 2.13.8
• 2.13.9
• 2.14.0
• 2.14.1

CPE 2.3info

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CPE 2.2info

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Entryinfo

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