Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Katacontainers | Confidential Containers | >= 0.9.0, < 0.20.0 |
| Katacontainers | Kata Containers | >= 3.4.0, < 3.29.0 |
Related Weaknesses (CWE)
References
- https://github.com/kata-containers/kata-containers/commit/1b9e49eb2763aa6ea6a99bPatch
- https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49mThird Party Advisory
- http://www.openwall.com/lists/oss-security/2026/05/13/2Third Party AdvisoryMailing List
- https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49mThird Party Advisory
FAQ
What is CVE-2026-41326?
CVE-2026-41326 is a vulnerability with a CVSS score of 8.2 (HIGH). 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...
How severe is CVE-2026-41326?
CVE-2026-41326 has been rated HIGH with a CVSS base score of 8.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-41326?
Check the references section above for vendor advisories and patch information. Affected products include: Katacontainers Confidential Containers, Katacontainers Kata Containers.