{"id":"CVE-2026-100838","published":"2026-09-27T02:17:22.083","lastModified":"2026-09-28T15:23:38.510","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'.","cvssScore":8.1,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwes":["CWE-59"],"vendors":[],"products":[],"references":[{"url":"https://github.com/edgelesssys/contrast/security/advisories/GHSA-rh99-wc69-c255","tags":[]},{"url":"https://www.vulncheck.com/advisories/contrast-before-1.19.1-copyfile-policy-symlink-subversion","tags":[]}],"exploitRefs":[{"url":"https://github.com/edgelesssys/contrast/security/advisories/GHSA-rh99-wc69-c255","tags":[]}],"hasPoc":true,"ai":null}