CVE-2026-47218

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/containerd/runwasi/commit/d28ab73c2c8a6c50d1927078821bd418b9e51638
https://github.com/containerd/runwasi/releases/tag/containerd-shim-wasmtime/v0.6.1
https://github.com/containerd/runwasi/security/advisories/GHSA-cc25-vq59-rcjx

Configurations

No configuration.

History

15 Oct 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-15 19:17

Updated : 2026-10-16 16:00

NVD link : CVE-2026-47218

Mitre link : CVE-2026-47218

CVE.ORG link : CVE-2026-47218

JSON object : View

Products Affected

No product.

CWE

CWE-502

Deserialization of Untrusted Data

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