---
id: CVE-2026-41326
title: >-
  Kata Containers is an open source project focusing on a standard
  implementation of lightweight Virtual Machines (VMs) that perform like
  containers
summary: >-
  Kata Containers is an open source project focusing on a standard
  implementation of lightweight Virtual Machines (VMs) that perform like
  containers. From v3.4.0 to v3.28.0, an oversight in the CopyFile policy (and
  perhaps the CopyFile han…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-61
  - CWE-1220
vendor: katacontainers
product: confidential_containers
affected:
  - 'confidential_containers >= 0.9.0, < 0.20.0'
  - 'kata_containers >= 3.4.0, < 3.29.0'
patched:
  - confidential_containers 0.20.0
  - kata_containers 3.29.0
published: '2026-04-24'
updated: '2026-08-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-41326'
references:
  - url: >-
      https://github.com/kata-containers/kata-containers/commit/1b9e49eb2763aa6ea6a99b276d3ff5e2c7f658f2
    label: security-advisories@github.com
  - url: >-
      https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8cc
    label: security-advisories@github.com
  - url: 'http://www.openwall.com/lists/oss-security/2026/05/13/2'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2026:25200'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/security/cve/CVE-2026-41326'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2460859'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: >-
      https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8cc
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41326.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
tags:
  - nvd
epss: 0.00348
epssPercentile: 0.28539
ingestedAt: '2026-08-24T14:04:35.525Z'
---

## Overview

Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. From v3.4.0 to v3.28.0, an oversight in the CopyFile policy (and perhaps the CopyFile handler) allows untrusted hosts to write to arbitrary locations inside the guest workload image. This can be used to overwrite binaries inside the guest and exfiltrate data from containers; even those running inside CVMs. This vulnerability is fixed in v3.29.0.

## Affected

- `confidential_containers >= 0.9.0, < 0.20.0`
- `kata_containers >= 3.4.0, < 3.29.0`

## Remediation

Upgrade past the affected range:

- `confidential_containers 0.20.0`
- `kata_containers 3.29.0`