CVE-2026-100838

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Source

https://cve.org/CVERecord?id=CVE-2026-100838

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100838.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-100838

Aliases

Published

2026-09-27T01:28:35Z

Modified

2026-09-28T03:48:30Z

Severity

8.6 (High) CVSS_V4 - 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 CVSS Calculator

Summary

Contrast before 1.19.1 CopyFile Policy Symlink Subversion

Details

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'.

Database specific

{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-59"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/100xxx/CVE-2026-100838.json"
}

References

Affected packages

Git / github.com/edgelesssys/contrast

Affected ranges

Type

GIT

Repo

https://github.com/edgelesssys/contrast

Events

Introduced

Fixed

2a5f2b256d9b0d8517d4653ed4e8bd7d39fb44f3

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0"
        },
        {
            "fixed":  "1.19.1"
        }
    ],
    "source":  [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Affected versions

v1.*

v1.19.0

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-100838.json"