Bytecodealliance Wasmtime
44 CVEs affecting Bytecodealliance Wasmtime. Latest disclosed: 2026-07-08. Critical: 3, High: 12.
| CVE | Severity | Score | Published | Summary |
|---|---|---|---|---|
CVE-2024-51745 | Critical | 10.0 | 2024-11-05 | Wasmtime is a fast and secure runtime for WebAssembly. Wasmtime's filesystem sandbox implementation on Windows blocks access to special device filenames such a… |
CVE-2026-34987 | Critical | 9.9 | 2026-04-09 | Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime with its Winch (baseline) non-default compiler backend may al… |
CVE-2023-26489 | Critical | 9.9 | 2023-03-08 | wasmtime is a fast and secure runtime for WebAssembly. In affected versions wasmtime's code generator, Cranelift, has a bug on x86_64 targets where address-mod… |
CVE-2022-39393 | High | 8.6 | 2022-11-10 | Wasmtime is a standalone runtime for WebAssembly. Prior to versions 2.0.2 and 1.0.2, there is a bug in Wasmtime's implementation of its pooling instance alloca… |
CVE-2026-34941 | High | 8.1 | 2026-04-09 | Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime contains a vulnerability where when transcoding a UTF-16 string to… |
CVE-2022-24791 | High | 8.1 | 2022-03-31 | Wasmtime is a standalone JIT-style runtime for WebAssembly, using Cranelift. There is a use after free vulnerability in Wasmtime when both running Wasm that us… |
CVE-2026-34971 | High | 7.8 | 2026-04-09 | Wasmtime is a runtime for WebAssembly. From 32.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Cranelift compilation backend contains a bug on aarch64 whe… |
CVE-2026-47261 | High | 7.5 | 2026-06-15 | Wasmtime is a runtime for WebAssembly. In versions prior to 24.0.9, 36.0.10, and 44.0.2, when a filesystem preopen is given DirPerms::all() and FilePerms::READ… |
CVE-2026-44216 | High | 7.5 | 2026-05-14 | Wasmtime is a runtime for WebAssembly. From 30.0.0 to 36.0.8, 43.0.2, and 44.0.1, Wasmtime's allocation logic for a WebAssembly table contained checked arithme… |
CVE-2026-35186 | High | 7.5 | 2026-04-09 | Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Winch compiler backend contains a bug where translating the… |
CVE-2026-34946 | High | 7.5 | 2026-04-09 | Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Winch compiler contains a vulnerability where the compilati… |
CVE-2026-34943 | High | 7.5 | 2026-04-09 | Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime contains a possible panic which can happen when a flags-typed comp… |
CVE-2026-27572 | High | 7.5 | 2026-02-24 | Wasmtime is a runtime for WebAssembly. Prior to versions 24.0.6, 36.0.6, 4.0.04, 41.0.4, and 42.0.0, Wasmtime's implementation of the `wasi:http/types.fields`… |
CVE-2026-27195 | High | 7.5 | 2026-02-24 | Wasmtime is a runtime for WebAssembly. Starting with Wasmtime 39.0.0, the `component-model-async` feature became the default, which brought with it a new imple… |
CVE-2021-32629 | High | 7.2 | 2021-05-24 | Cranelift is an open-source code generator maintained by Bytecode Alliance. It translates a target-independent intermediate representation into executable mach… |
CVE-2026-58494 | Medium | 6.5 | 2026-07-08 | Wasmtime is a runtime for WebAssembly. Prior to 24.0.11, 36.0.12, 45.0.3, and 46.0.1, wasmtime-wasi hard-link creation and renaming check directory permissions… |
CVE-2026-34945 | Medium | 6.5 | 2026-04-09 | Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Winch compiler contains a bug where a 64-bit table, part of… |
CVE-2026-34942 | Medium | 6.5 | 2026-04-09 | Wasmtime is a runtime for WebAssembly. Prior to 24.0.7, 36.0.7, 42.0.2, and 43.0.1, Wasmtime's implementation of transcoding strings into the Component Model's… |
CVE-2026-27204 | Medium | 6.5 | 2026-02-24 | Wasmtime is a runtime for WebAssembly. Prior to versions 24.0.6, 36.0.6, 4.0.04, 41.0.4, and 42.0.0, Wasmtime's implementation of WASI host interfaces are susc… |
CVE-2022-31146 | Medium | 6.4 | 2022-07-21 | Wasmtime is a standalone runtime for WebAssembly. There is a bug in the Wasmtime's code generator, Cranelift, where functions using reference types may be inco… |