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CVE-2026-18675

Published Aug 12, 2026 CWE-248

Overview

CVE-2026-18675 is a known-severity vulnerability. It was published on August 12, 2026.

Technical Description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Ref developer.konghq.com/mesh/changelog/ GitHub github.com/kumahq/kuma/pull/17465 GitHub github.com/kumahq/kuma/pull/17467 GitHub github.com/kumahq/kuma/pull/17468 GitHub github.com/kumahq/kuma/pull/17469 GitHub github.com/kumahq/kuma/pull/17470 GitHub github.com/kumahq/kuma/pull/17471 GitHub github.com/kumahq/kuma/pull/17472 GitHub github.com/kumahq/kuma/security/advisories/GHSA-5mxq-7xq4-3vx8

Frequently Asked Questions

What is CVE-2026-18675?

CVE-2026-18675 is a known-severity vulnerability. It was published on August 12, 2026.

How severe is CVE-2026-18675?

CVSS score information is not yet available for this vulnerability. Check back as the CVE record is updated by NVD analysts.

How do I fix or remediate CVE-2026-18675?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-18675?

CyberStrike's AI-powered security agents can automatically detect CVE-2026-18675 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

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