{"cve":"CVE-2026-44210","nvd":{"published":"2026-07-23T18:16:51.053","modified":"2026-08-06T00:57:54.957","status":"Analyzed","description":"Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. Versions prior to 3.31.0 ship with a default configuration that allows pod creators to inject arbitrary command-line arguments into the virtiofsd process through the `io.katacontainers.config.hypervisor.virtio_fs_extra_args` pod annotation. By injecting `-o source=/` along with `--no-announce-submounts` and `--sandbox=none`, an attacker can override the virtiofsd shared directory to serve the entire host root filesystem into the guest VM. Combined with the `kernel_params` annotation (also enabled by default) to activate the agent debug console, the attacker can mount the host filesystem from inside the VM and read or write any file on the host, including /etc/shadow. Version 3.31.0 patches the issue.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H/E:P","score":5.8},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":9.9},"cwes":["CWE-88"],"references":["https://github.com/kata-containers/kata-containers/commit/ffa59ce3aa7877d067c9a372df0c329a23a01744","https://github.com/kata-containers/kata-containers/security/advisories/GHSA-rr59-xxvx-96qr","https://github.com/kata-containers/kata-containers/security/advisories/GHSA-rr59-xxvx-96qr"],"products":["katacontainers:kata_containers"],"source":"nvd","synced_at":"2026-10-19T22:45:53.305392138+00:00"},"epss":{"cve":"CVE-2026-44210","score":0.00593,"percentile":0.48373,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-rr59-xxvx-96qr","url":"https://osv.dev/vulnerability/GHSA-rr59-xxvx-96qr","summary":"Kata Containers have VM Escape via virtiofsd Argument Injection through Default-Enabled Pod Annotations","modified":"2026-07-28T02:00:32.728878539Z","packages":[{"ecosystem":"Go","name":"github.com/kata-containers/kata-containers","purl":"pkg:golang/github.com/kata-containers/kata-containers","ranges":["<0.0.0-20260519062212-ffa59ce3aa78"],"fixed":["0.0.0-20260519062212-ffa59ce3aa78"]}]},{"id":"GO-2026-5638","url":"https://osv.dev/vulnerability/GO-2026-5638","summary":"Kata Containers have VM Escape via virtiofsd Argument Injection through Default-Enabled Pod Annotations in github.com/kata-containers/kata-containers","modified":"2026-06-25T23:01:36.345270591Z","packages":[{"ecosystem":"Go","name":"github.com/kata-containers/kata-containers","purl":"pkg:golang/github.com/kata-containers/kata-containers","ranges":["<0.0.0-20260519062212-ffa59ce3aa78"],"fixed":["0.0.0-20260519062212-ffa59ce3aa78"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}