HIGHVulnerability
Verified
Global

NVD HIGH: CVE-2026-100838 — Contrast is a confidential-computing runtime for Kubernetes. In versions before ...

·Source: NIST NVD

Updated:

Executive Summary

Contrast is a confidential-computing runtime for Kubernetes. In versions before 1.19.1, the Kata agent policies generated by the Contrast CLI contained a flaw in the CopyFile verification that allowed arbitrary writes to the guest root filesystem. A malicious process on the untrusted host able to connect to the Kata agent VSOCK could issue a series of CopyFile requests to overwrite security-critic

Analysis

Contrast is a confidential-computing runtime for Kubernetes. In versions before 1.19.1, the Kata agent policies generated by the Contrast CLI contained a flaw in the CopyFile verification that allowed arbitrary writes to the guest root filesystem. A malicious process on the untrusted host able to connect to the Kata agent VSOCK could issue a series of CopyFile requests to overwrite security-critical files in the guest or trick the workload into disclosing sensitive data, effectively amounting to a full guest takeover. Users unable to upgrade can apply an equivalent rego policy fix passed to 'contrast generate --policy'. CVSS Score: 8.1. Published: 2026-09-27T02:17:22.083.

Indicators of Compromise (1)

CVE (1)
CVE-2026-100838
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Sep 27, 2026. Verified by: NIST.

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