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Wasmtime 50.0.1

A fast and secure runtime for WebAssembly

filecart Windows Updated Oct 30, 2026
Download 12.19 MB
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About Wasmtime

Wasmtime is a Bytecode Alliance project that is a standalone wasm-only optimizing runtime for WebAssembly and WASI. It runs WebAssembly code outside of the Web, and can be used both as a command-line utility or as a library embedded in a larger application.

License: Apache-2.0
Release info Update on Oct 29, 2026
Release notes 50.0.1

Released 2026-10-29.

Fixed
• wasi-sockets: UDP connect only required the address to be permitted for
sending *or* receiving, allowing guests to send datagrams to addresses denied
for UdpSend.
GHSA-hmmr-87qq-258j
• Cross-engine type confusion with host-created struct-types-with-supertypes
has been fixed.
GHSA-qw58-7h65-crq2
• Panic with typed functions with i31 or nullref arguments has been fixed.
GHSA-3982-jqvv-277m
• Unchecked memory usage in transferring borrowed resources between components
has been fixed.
GHSA-6fr9-xmw9-5352
• Fixed a possibility of content-length being invalid or not matching body
length in wasi-http p2.
GHSA-h4wp-g4x3-7398
Related tags aot cranelift jit runtime rust
Listing datawinget

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