Contrast before 1.19.1 CopyFile Policy Symlink Subversion
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'.
CVE-2026-100838
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-100838
contrast
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "edgelesssys",
"product": "contrast",
"versions": [
{
"status": "affected",
"version": "0",
"lessThan": "1.19.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "1.19.1",
"versionType": "semver"
}
],
"packageURL": "pkg:golang/github.com/edgelesssys/contrast",
"defaultStatus": "unaffected"
}
]- Related CVEs
- CVE-2026-100838
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #12679 · Revision 1
- Added to Heist Feed
- Publisher date