CVE WatchOct 8, 2026

CVE-2026-100838

Contrast is a confidential-computing runtime for Kubernetes. In versions before 1.19.1, the Kata agent policies generated by the Contrast CL

CVSS

8.1

High

EPSS

0.2%

p13

KEV

—

Exploit Today

0-100

Published: Sep 27, 2026 · Last modified: Oct 8, 2026 · CWE-59

EPSS · 30d

0.2%EPSS · 30 days0.2%

2026-09-272026-10-25

Technical description

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'.

Official references

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