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crates.io · #4590 most downloaded on crates.io
WASI implementation in Rust
Last release 6 days ago
02 Oct 2026
Ships fairly regularly
a new release about every 2 weeks
Rarely documented
notes for 9 of the last 60 stable releases
Nothing withdrawn
no release was ever pulled
7 years old
216 releases · first in 2019
Guest controlled-size host heap allocation through WASIp3 streams. GHSA-x84v-gj2h-g759
Released 2026-08-20
Guest controlled-size host heap allocation through WASIp3 streams.
GHSA-x84v-gj2h-g759
Filesystem sandbox escape when paths or symlinks contain trailing slashes.
GHSA-vqjp-4c8c-hfgg
v46.0.3: Release Wasmtime 46.0.3 (#14170)
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Stores can mix up type indices between engines. GHSA-hgjw-h833-99q9
Released 2026-07-31.
Stores can mix up type indices between engines.
GHSA-hgjw-h833-99q9
Preemption and traps during bulk operations enable breaking internal VM state.
GHSA-2hw9-mc66-jc2q
One column per quarter.
v46.0.2: Release Wasmtime 46.0.2 (#14038)
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WASI preview 0 implementation of poll_oneoff circumvents fuel consumption. GHSA-j366-h8gg-77pm
Released 2026-10-02.
WASI preview 0 implementation of poll_oneoff circumvents fuel consumption.
GHSA-j366-h8gg-77pm
Excessive allocated memory on the host when guests don't have stdio.
GHSA-gqmc-89g8-p25r
fd_readdir copies uninitialized struct padding into guest memory.
GHSA-96f6-r43r-8c24
v36.0.17: Release Wasmtime 36.0.17 (#14472)
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Fix fuel spend for dynamic record lifting. GHSA-jqpg-j7w6-42pr
Released 2026-09-24.
Fix fuel spend for dynamic record lifting.
GHSA-jqpg-j7w6-42pr
Fix host memory exhaustion on outgoing HTTP body write.
GHSA-c9gc-w9vx-w86p
wasmtime-wasi: Fix panic on out-of-range datetimes in WASI filesystem set-times, set-times-at.
GHSA-j2g9-4prp-pf6h
v36.0.16: Release Wasmtime 36.0.16 (#14402)
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Wasmtime's internal implementation of wasmtime-wasi no longer depends on cap-std crates for the underlying implementation. Instead the cap-std impleme
Released 2026-09-10
wasmtime-wasi no longer depends oncap-std crates for the underlying implementation. Instead the cap-stdwasmtime-wasi. This is intended to have nov36.0.15: Release Wasmtime 36.0.15 (#14309)
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Filesystem sandbox escape when paths or symlinks contain trailing slashes. GHSA-vqjp-4c8c-hfgg
Released 2026-08-20
v36.0.14: Release Wasmtime 36.0.14 (#14172)
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Stores can mix up type indices between engines. GHSA-hgjw-h833-99q9
Released 2026-07-31.
v36.0.13: Release Wasmtime 36.0.13 (#14035)
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