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CVE-2026-41326— Kata Containers: CopyFile Policy Subversion via Symlinks

Quick assessment

Affected
kata-containers kata-containers
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Kata Containers是Kata Containers社区的一款开源的轻量级虚拟机构建程序。 Kata Containers 3.4.0版本至3.28.0版本存在安全漏洞，该漏洞源于CopyFile策略处理不当，可能导致不受信任主机写入任意位置。

CVSS 8.2 · High EPSS 0.37% · P30

Affected Version Matrix 1

VendorProduct Version RangeStatus
kata-containers kata-containers >= 3.4.0, < 3.29.0 affected
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I. Basic Information for CVE-2026-41326

Vulnerability Information
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Vulnerability Title
Kata Containers: CopyFile Policy Subversion via Symlinks
Source: CVE Program / CVE List V5
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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-61
Source: CVE Program / CVE List V5
Vulnerability Title
Kata Containers 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Kata Containers是Kata Containers社区的一款开源的轻量级虚拟机构建程序。 Kata Containers 3.4.0版本至3.28.0版本存在安全漏洞，该漏洞源于CopyFile策略处理不当，可能导致不受信任主机写入任意位置。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
kata-containers kata-containers >= 3.4.0, < 3.29.0 -

II. Public POCs for CVE-2026-41326

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 14654 chars
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Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-41326

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Patches & Fixes for CVE-2026-41326 (1)

Vendor Advisories for CVE-2026-41326 (1)

IV. Related Vulnerabilities

Same product: kata-containers
Same vendor: kata-containers
Same weakness: CWE-61

V. Comments for CVE-2026-41326

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