{"answers":{"affected":"3 open source packages ship an affected version, including github.com/kata-containers/kata-containers.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-47243 exists.","fix":"Upgrade github.com/kata-containers/kata-containers to 0.0.0-20260519062212-ffa59ce3aa78 or later.","what":"CVE-2026-47243 is a critical path traversal vulnerability in kata-containers, published on 7 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-47243 and fix it if it is affected.\n\nWhat it is: CVE-2026-47243 is a critical path traversal vulnerability in kata-containers, published on 7 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-47243 exists.\n\nAffected packages and fixed versions:\n- github.com/kata-containers/kata-containers (Go): affected all versions; fixed in 0.0.0-20260519062212-ffa59ce3aa78\n- github.com/kata-containers/kata-containers (Go): affected all versions; fixed in 0.0.0-20260519062212-ffa59ce3aa78\n- github.com/kata-containers/kata-containers (Go): affected all versions; fixed in 0.0.0-20260519062212-ffa59ce3aa78\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-47243/ (Markdown: https://insights.sbomify.com/CVE-2026-47243/index.md)","id":"CVE-2026-47243","markdown":"https://insights.sbomify.com/CVE-2026-47243/index.md","name":"CVE-2026-47243","record":{"aliases":["AZL-94607","GHSA-2gv2-cffp-j227","GO-2026-5042","OESA-2026-2527","OESA-2026-2528","OESA-2026-2557"],"analysis":{"component_type":"container_or_infrastructure","fix_type":"upgrade","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Kata Containers runtime","requires_auth":"high_privilege","summary":"Guest root can escape to host root via virtiofs path traversal in non-default runtime-rs configurations, enabling arbitrary code execution on the host.","user_interaction":"not_required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":9.2,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N","version":"4.0"},"cwes":[{"id":"CWE-36","name":"Absolute Path Traversal"},{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"Kata Containers is an open source project focusing on a standard implementation of lightweight Virtual Machines (VMs) that perform like containers. Prior to 3.31.0, the runtime-rs standalone virtio-fs path is vulnerable to a guest-root to host-root escape. In this configuration, Kata runs the host virtiofsd as root with --sandbox none --seccomp none, so an attacker with root-equivalent access inside the guest can bypass the guest virtio-fs client entirely by taking over the virtio-fs PCI device and building a virtqueue in userspace to submit raw FUSE requests directly to the host virtiofsd. A crafted FUSE_SYMLINK request whose new symlink name is an absolute host path is honored outside the configured shared directory, allowing guest root to create root-owned symlinks in sensitive host locations such as /etc/cron.d. By pointing such a symlink at a guest-controlled crontab payload reachable through a live runtime process's mount namespace, the attacker causes the host cron daemon to execute that payload as host root, crossing the Kata isolation boundary. This issue is fixed in version 3.31.0.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Kata guest escape: runtime-rs guest-root to host-root escape via virtiofs","id":"CVE-2026-47243","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":3,"n_references":1,"next":{"headline":"Netty HTTP/2: Advertised MAX_CONCURRENT_STREAMS are not enforced","id":"CVE-2026-47244"},"packages":[{"ecosystem":"Go","fixed":["0.0.0-20260519062212-ffa59ce3aa78"],"introduced":["0"],"last_affected":[],"package":"github.com/kata-containers/kata-containers","purl":null,"source":"GHSA-2gv2-cffp-j227"},{"ecosystem":"Go","fixed":["0.0.0-20260519062212-ffa59ce3aa78"],"introduced":["0"],"last_affected":[],"package":"github.com/kata-containers/kata-containers","purl":"pkg:golang/github.com/kata-containers/kata-containers","source":"GHSA-2gv2-cffp-j227"},{"ecosystem":"Go","fixed":["0.0.0-20260519062212-ffa59ce3aa78"],"introduced":["0"],"last_affected":[],"package":"github.com/kata-containers/kata-containers","purl":"pkg:golang/github.com/kata-containers/kata-containers","source":"GO-2026-5042"}],"prev":{"headline":"Net::IMAP: Command Injection via ID command argument","id":"CVE-2026-47242"},"products":["kata-containers"],"published":"2026-08-07","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-10","vendors":["kata-containers"]},"summary":"Guest root can escape to host root via virtiofs path traversal in non-default runtime-rs configurations, enabling arbitrary code execution on the host.","url":"https://insights.sbomify.com/CVE-2026-47243/"}