{"id":"CVE-2026-100838","revision":"d0727c36e66c4bbfb34e2529191b26eb","records":[{"revision":"d0727c36e66c4bbfb34e2529191b26eb","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-100838","aliases":[],"title":"Contrast before 1.19.1 CopyFile Policy Symlink Subversion","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'.","state":0,"publishedAt":"2026-09-27T01:28:35.498+00:00","modifiedAt":"2026-10-08T15:22:00.652+00:00","affected":[{"ecosystem":"Vendor product","name":"contrast","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"edgelesssys\",\n                    \"product\": \"contrast\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"1.19.1\"\n                        },\n                        {\n                            \"version\": \"1.19.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:golang/github.com/edgelesssys/contrast\"\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","score":8.6,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":8.1,"severity":"HIGH"}],"references":["https://github.com/edgelesssys/contrast/security/advisories/GHSA-rh99-wc69-c255","https://www.vulncheck.com/advisories/contrast-before-1.19.1-copyfile-policy-symlink-subversion"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-100838","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-100838","identifiers":["CVE-2026-100838"]},"retained":false,"historicalAffected":[]}],"coverage":[]}