CVE-2026-41326

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 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 Software

Weaknesses

• CWE-61: CWE-61: UNIX Symbolic Link (Symlink) Following

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8cc

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2026/05/13/2

kata-containers: Arbitrary file write inside guest image via CopyFile policy

Additional References

• https://access.redhat.com/security/cve/CVE-2026-41326
• https://bugzilla.redhat.com/show_bug.cgi?id=2460859
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-41326.json
• https://access.redhat.com/errata/RHSA-2026:25200

References

• https://github.com/kata-containers/kata-containers/security/advisories/GHSA-q49m-57vm-c8cc
• https://github.com/kata-containers/kata-containers/commit/1b9e49eb2763aa6ea6a99b276d3ff5e2c7f658f2

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