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Vulnerability record · CVE-2026-50540 · published 7 August 2026

CVE-2026-50540: Improper input validation vulnerability

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.

9.6 CVSS 3.1 Critical EPSS 0.61% · top 53.1% CWE-20 · Improper input validationCWE-22 · Path traversal Deferred
9.6CVSS 3.1 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
9 Sep 2026Last modified by NVD

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.

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

References

LinkTags
https://github.com/kata-containers/kata-containers/commit/03cc670076099530f4e1e9cb22849afdafb20f65
https://github.com/kata-containers/kata-containers/security/advisories/GHSA-mp2j-xm59-qfgw
http://www.openwall.com/lists/oss-security/2026/08/23/3
http://www.openwall.com/lists/oss-security/2026/08/24/1

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Source: NIST National Vulnerability Database (record CVE-2026-50540), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.