CVE-2026-100838
Contrast is a confidential-computing runtime for Kubernetes.
Impact
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'.
Affected products
| Product | Affected versions |
|---|---|
| Versions | before 1.19.1 |
Versions were read from the advisory text. No structured product data has been published for this record yet.