Issues

• RUSTSEC-2026-0386: AsyncFd::new and related constructors violate I/O safety

  bytecodealliance/wasmtime#14977 · Filter by author github-actions opened on Oct 24, 2026

• Read-only access to numeric globals from epoch/call hooks (StoreHookState)

  enhancementwasmtime:api
  bytecodealliance/wasmtime#14965 · Filter by author smarcd opened on Oct 23, 2026
  1

• component adapter: large single argument or environment value still traps

  bytecodealliance/wasmtime#14960 · Filter by author xia-chao opened on Oct 23, 2026

• Cranelift: rule verifier unsoundness bug

  bugcranelift
  bytecodealliance/wasmtime#14957 · Filter by author bongjunj opened on Oct 23, 2026
  1

• Component Func::call (sync call) can fail due to a lack of event loop

  wasm-proposal:component-model-async
  bytecodealliance/wasmtime#14950 · Filter by author alexcrichton opened on Oct 22, 2026

• Lent own handle can be dropped before the subtask's result is delivered

  wasm-proposal:component-model-async
  bytecodealliance/wasmtime#14949 · Filter by author alexcrichton opened on Oct 22, 2026

• aarch64: nested stack_limit global-value load with a large offset clobbers its own base register

  bugcranelift:area:aarch64cranelift
  bytecodealliance/wasmtime#14946 · Filter by author alexcrichton opened on Oct 22, 2026

• aarch64: Wrong unwind info and panics on Windows

  bugcranelift:area:aarch64cranelift
  bytecodealliance/wasmtime#14939 · Filter by author alexcrichton opened on Oct 22, 2026

• aarch64: A number of issues with BTI and its implementation

  bugcranelift:area:aarch64cranelift
  bytecodealliance/wasmtime#14938 · Filter by author alexcrichton opened on Oct 22, 2026

• Should wasmtime-wasi-nn be developed out-of-tree?

  wasi-nn
  bytecodealliance/wasmtime#14937 · Filter by author alexcrichton opened on Oct 22, 2026
  1

• discuss: should graceful shutdown have an upper bound?

  bytecodealliance/wasmtime#14935 · Filter by author xia-chao opened on Oct 22, 2026
  1

• interrupt_poll isn't handled by the inliner or by stack maps

  cranelift
  bytecodealliance/wasmtime#14926 · Filter by author alexcrichton opened on Oct 21, 2026

• Moving a ready subtask to another waitable set leaves a stale DeliverEvent: "BUG: delivering non-present event"

  wasm-proposal:component-model-async
  bytecodealliance/wasmtime#14878 · Filter by author FrancoisLDaigneault opened on Oct 20, 2026
  2

• The wasmtime CLI doesn't support labelled WASI imports or exports

  bytecodealliance/wasmtime#14859 · Filter by author jrandolf opened on Oct 19, 2026
  3

• Panic in GC with guest-debug enabled

  wasm-proposal:gcwasmtime:debugging
  bytecodealliance/wasmtime#14845 · Filter by author alexcrichton opened on Oct 19, 2026
  1

• Tracking issue: remaining work before enabling map<K, V> by default

  wasm-proposal:component-model-map
  bytecodealliance/wasmtime#14844 · Filter by author jrandolf opened on Oct 19, 2026

• Duplicate keys in map<K, V> leak handles

  wasm-proposal:component-model-map
  bytecodealliance/wasmtime#14812 · Filter by author alexcrichton opened on Oct 19, 2026
  1

• The wasmtime CLI does not support map<K, V>

  wasm-proposal:component-model-map
  bytecodealliance/wasmtime#14811 · Filter by author alexcrichton opened on Oct 19, 2026

• RUSTSEC-2026-0369: ZipStreamReader::extract() and ZipArchive::extract() apply Unix permissions through symlinks without confining the target

  bytecodealliance/wasmtime#14790 · Filter by author github-actions opened on Oct 17, 2026
  1

• wasi-http p3: reused instance leaks handles until it traps when a content-length response body is dropped after content-length bytes

  bug
  bytecodealliance/wasmtime#14769 · Filter by author avkonst opened on Oct 15, 2026

• Cranelift: missed optimization Improve divisibility test by constant

  cranelift:goal:optimize-speedcranelift
  bytecodealliance/wasmtime#14699 · Filter by author Takashiidobe opened on Oct 13, 2026
  1

• Error contexts sent through futures/streams aren't reference-counted

  bugwasm-proposal:component-model-error-context
  bytecodealliance/wasmtime#14674 · Filter by author alexcrichton opened on Oct 12, 2026
  1

• Error contexts have no limit on their debug message size

  bugwasm-proposal:component-model-error-context
  bytecodealliance/wasmtime#14669 · Filter by author alexcrichton opened on Oct 12, 2026

• Cranelift: x86_64 lowering i8 multiply with mulb could be optimized

  cranelift:area:x64enhancement
  bytecodealliance/wasmtime#14660 · Filter by author Takashiidobe opened on Oct 11, 2026

• Instantiation of modules with large element segments into imported tables regressed ~7x since #13487

  performance
  bytecodealliance/wasmtime#14616 · Filter by author veeshi opened on Oct 8, 2026
  1