CVE-2026-41326

Name: CVE-2026-41326
Creator: NVD / NIST
Published: 2026-04-24T19:17:12.253+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.2/10EPSS 0.29%

Last modified Jun 17, 2026

CVE-2026-41326 is a high-severity vulnerability rated 8.2/10 on the CVSS scale. 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. EPSS estimates a 0.29% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.2/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

CVSS 4.0

8.2/10

CVSS:4.0/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

EPSS Probability

0.29%

20.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-61

Affected Software

Vendor	Product	Versions
Katacontainers	Confidential Containers	>= 0.9.0, < 0.20.0
Katacontainers	Kata Containers	>= 3.4.0, < 3.29.0

References

https://github.com/kata-containers/kata-containers/commit/1b9e49eb2763aa6ea6a99b276d3ff5e2c7f658f2Patch
https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8ccThird Party Advisory
http://www.openwall.com/lists/oss-security/2026/05/13/2Mailing List, Third Party Advisory
https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8ccThird Party Advisory

Timeline

Published: Apr 24, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-41326?

How severe is CVE-2026-41326?

CVE-2026-41326 has a CVSS score of 8.2/10 (HIGH severity). The EPSS model estimates a 0.29% probability of exploitation in the next 30 days.

How do I fix CVE-2026-41326?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-41326?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST