CVE-2026-41326
Kata Containers: CopyFile Policy Subversion via Symlinks
Description
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.
INFO
Published Date :
April 24, 2026, 7:17 p.m.
Last Modified :
July 15, 2026, 2:21 a.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-41326
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update Kata Containers to v3.29.0 or later.
- Review and sanitize CopyFile policy configurations.
- Restrict host access to guest workloads.
- Monitor for unauthorized file modifications.
Public PoC/Exploit Available at Github
CVE-2026-41326 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-41326.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-41326 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-41326
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Look for possible escape vectors from a container
aws azure cicd devsecops docker kubernetes kubernetes-security cve-scanning kernel-hardening kernel-security
Shell
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-41326 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-41326 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jul. 15, 2026
Action Type Old Value New Value Changed Affected [{'cpes': ['cpe:/a:redhat:openshift:4.19::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift Container Platform 4.19', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:confidential_compute_attestation:1'], 'vendor': 'Red Hat', 'product': 'Confidential Compute Attestation', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift:4'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift Container Platform 4', 'defaultStatus': 'affected'}] [{'cpes': ['cpe:/a:redhat:openshift:4.19::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift Container Platform 4.19', 'versions': [{'status': 'unaffected', 'version': '4.19.9.6.202606100451-0', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'rhcos', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:confidential_compute_attestation:1'], 'vendor': 'Red Hat', 'product': 'Confidential Compute Attestation', 'packageName': 'openshift-sandboxed-containers/osc-cloud-api-adaptor-rhel9', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:confidential_compute_attestation:1'], 'vendor': 'Red Hat', 'product': 'Confidential Compute Attestation', 'packageName': 'openshift-sandboxed-containers/osc-monitor-rhel9', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:confidential_compute_attestation:1'], 'vendor': 'Red Hat', 'product': 'Confidential Compute Attestation', 'packageName': 'openshift-sandboxed-containers/osc-operator-bundle', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:confidential_compute_attestation:1'], 'vendor': 'Red Hat', 'product': 'Confidential Compute Attestation', 'packageName': 'openshift-sandboxed-containers/osc-podvm-builder-rhel9', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:confidential_compute_attestation:1'], 'vendor': 'Red Hat', 'product': 'Confidential Compute Attestation', 'packageName': 'openshift-sandboxed-containers/osc-podvm-payload-rhel9', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:confidential_compute_attestation:1'], 'vendor': 'Red Hat', 'product': 'Confidential Compute Attestation', 'packageName': 'openshift-sandboxed-containers/osc-rhel9-operator', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:openshift:4'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift Container Platform 4', 'packageName': 'cri-o', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:openshift:4'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift Container Platform 4', 'packageName': 'openshift4/ose-azure-file-csi-driver-rhel9', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:openshift:4'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift Container Platform 4', 'packageName': 'rhcos', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}] -
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jun. 30, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:/a:redhat:openshift:4.19::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift Container Platform 4.19', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:confidential_compute_attestation:1'], 'vendor': 'Red Hat', 'product': 'Confidential Compute Attestation', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift:4'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift Container Platform 4', 'defaultStatus': 'affected'}] Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-1220 Added Reference https://access.redhat.com/errata/RHSA-2026:25200 Added Reference https://access.redhat.com/security/cve/CVE-2026-41326 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2460859 Added Reference https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41326.json -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'kata-containers', 'product': 'kata-containers', 'versions': [{'status': 'affected', 'version': '>= 3.4.0, < 3.29.0'}]}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-41326', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-04-27T13:43:48.851429Z'} -
Initial Analysis by [email protected]
May. 14, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:katacontainers:confidential_containers:*:*:*:*:*:*:*:* versions from (including) 0.9.0 up to (excluding) 0.20.0 *cpe:2.3:a:katacontainers:kata_containers:*:*:*:*:*:*:*:* versions from (including) 3.4.0 up to (excluding) 3.29.0 Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/05/13/2 Types: Mailing List, Third Party Advisory Added Reference Type GitHub, Inc.: https://github.com/kata-containers/kata-containers/commit/1b9e49eb2763aa6ea6a99b276d3ff5e2c7f658f2 Types: Patch Added Reference Type CISA-ADP: https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8cc Types: Third Party Advisory Added Reference Type GitHub, Inc.: https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8cc Types: Third Party Advisory -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
May. 13, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2026/05/13/2 -
CVE Modified by [email protected]
May. 04, 2026
Action Type Old Value New Value Added Reference https://github.com/kata-containers/kata-containers/commit/1b9e49eb2763aa6ea6a99b276d3ff5e2c7f658f2 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Apr. 27, 2026
Action Type Old Value New Value Added Reference https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8cc -
New CVE Received by [email protected]
Apr. 24, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-61 Added Reference https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8cc