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CVE-2026-50540— Kata Containers: Config Path Annotation Arbitrary File Loading

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.

WordPress Formidable Forms是WordPress基金会开源的一款表单创建插件。 Kata Containers 4.0.0之前版本存在安全漏洞，该漏洞源于未验证的配置路径注释，可能导致pod用户通过提供恶意配置，选择攻击者控制的hypervisor或virtio-fs守护进程二进制文件，以root身份在主机上执行代码。

CVSS 9.6 · Critical EPSS 0.61% · P48

Affected Version Matrix 1

VendorProduct Version RangeStatus
kata-containers kata-containers < 4.0.0 affected
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I. Basic Information for CVE-2026-50540

Vulnerability Information
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Vulnerability Title
Kata Containers: Config Path Annotation Arbitrary File Loading
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. Prior to version 4.0.0, kata-runtime is vulnerable to host code execution via an unvalidated configuration path annotation. The runtime accepts an arbitrary io.katacontainers.config_path pod annotation and loads the referenced host TOML file without restriction. As a result, a pod user who can place a file at a host-visible path can supply a configuration that selects an attacker-controlled hypervisor or virtio-fs daemon binary, executing code as root on the host. This issue is fixed in version 4.0.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Kata Containers 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress Formidable Forms是WordPress基金会开源的一款表单创建插件。 Kata Containers 4.0.0之前版本存在安全漏洞，该漏洞源于未验证的配置路径注释，可能导致pod用户通过提供恶意配置，选择攻击者控制的hypervisor或virtio-fs守护进程二进制文件，以root身份在主机上执行代码。
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 < 4.0.0 -

II. Public POCs for CVE-2026-50540

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7496 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
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POC zip download
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III. Intelligence Information for CVE-2026-50540

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Patches & Fixes for CVE-2026-50540 (1)

Vendor Advisories for CVE-2026-50540 (1)

Same Patch Batch · kata-containers · 2026-08-07 · 3 CVEs total

CVE-2026-47243 9.2 CRITICAL Kata guest escape: runtime-rs guest-root to host-root escape via virtiofs
CVE-2026-64676 5.7 MEDIUM Kata Containers: Unauthorized mem-agent ttRPC methods let an untrusted host tamper with co

IV. Related Vulnerabilities

Same product: kata-containers
Same vendor: kata-containers
Same weakness: CWE-20

V. Comments for CVE-2026-50540

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