medium4.8
CVE-2026-119136
Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains insufficient checks in Store when mixing async-style and sync-style WebAssembly calls.
Impact
Wasmtime 42.0.0 before 48.0.6 and 49.0.0 before 49.0.3 contains insufficient checks in Store when mixing async-style and sync-style WebAssembly calls. Embedders re-entering WebAssembly via sync APIs from host functions called asynchronously can trigger runtime panics or unsound cross-thread movement of !Send host variables.
Affected products
| Product | Affected versions |
|---|---|
| Wasmtime 42.0.0 | before 48.0.6 |
| 49.0.0 | before 49.0.3 |
Versions were read from the advisory text. No structured product data has been published for this record yet.