CVE-2025-53901

Wasmtime WASI (wasmtime-wasi) contains a bug in the WASIp1 import implementation. Prior to 24.0.4, 33.0.2, and 34.0.2, calling fd_renumber followed by path_open can cause a WebAssembly guest to panic the host (embedder). The panic results from a corrupt state in fd_renumber when a second open fil...

CVE-2025-61670

CVE-2025-61670 affects Wasmtime 37.0.0 and 37.0.1, where memory leaks occur in the C/C++ API when using bindings for the WebAssembly values anyref/externref. The root cause is a Rust refactor changing ManuallyRooted to OwnedRooted and incomplete propagation of ownership semantics to the C/C++ API...

CVE-2025-62711

Wasmtime (WebAssembly runtime) versions 38.0.0–38.0.2 contain a bug in the component-model host-to-wasm trampolines that can crash the host (segfault or assert) when a component is carefully crafted and invoked in a specific way. This issue is fixed in Wasmtime 38.0.3; there are no known workarou...