{"id":"CVE-2026-47218","revision":null,"records":[{"revision":"d17250fd915540a6bc3f04d4b71b871b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-47218","aliases":[],"title":"runwasi: Forged Wasmtime precompiled OCI layer bypasses runwasi WASI sandbox","description":"runwasi facilitates running Wasm and WASI workloads managed by containerd. Prior to 0.6.1, containerd-shim-wasmtime-v1 can treat Wasmtime precompiled bytes supplied directly in an OCI image layer as a trusted artifact from the precompile-cache path and deserialize them as native code. An attacker who causes a victim to run a crafted image can bypass WebAssembly validation and execute native code in the shim zygote process, gaining the filesystem, environment, credentials, networking, and Linux syscall access available to the workload container. Downstream shims built with runwasi's containerd-shim-wasm precompile-cache API are also affected if they implement Compiler and trust executable precompiled artifacts from OCI image layers; the 0.6.1 boundary applies specifically to containerd-shim-wasmtime and does not independently certify downstream product releases. The flaw escapes the WASI sandbox to the workload container boundary, but it does not by itself bypass container isolation or provide direct host code execution. This issue is fixed in version 0.6.1.","state":0,"publishedAt":"2026-10-15T18:16:10.236+00:00","modifiedAt":"2026-10-15T19:55:14.129+00:00","affected":[{"ecosystem":"Vendor product","name":"runwasi","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"containerd\",\n                    \"product\": \"runwasi\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.6.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":9.3,"severity":"CRITICAL"}],"references":["https://github.com/containerd/runwasi/security/advisories/GHSA-cc25-vq59-rcjx","https://github.com/containerd/runwasi/commit/d28ab73c2c8a6c50d1927078821bd418b9e51638","https://github.com/containerd/runwasi/releases/tag/containerd-shim-wasmtime/v0.6.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-47218","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-47218","identifiers":["CVE-2026-47218"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-09T14:04:00.1516715+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-09T14:04:00.1516715+00:00","lastSuccessAt":"2026-11-09T14:04:00.2978136+00:00","error":null,"lastVerifiedAt":"2026-11-09T14:04:00.297814+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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