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RUSTSEC-2026-0099: Name constraints were accepted for certificates asserting a wildcard name

Status: Open.

#13117 In bytecodealliance/wasmtime;

· github-actions opened on Apr 16, 2026

RUSTSEC-2026-0098: Name constraints for URI names were incorrectly accepted

Status: Open.

#13116 In bytecodealliance/wasmtime;

· github-actions opened on Apr 16, 2026

Should we define GC-related VM types in wasmtime-environ?

Status: Open.

#13114 In bytecodealliance/wasmtime;

· fitzgen opened on Apr 15, 2026

Deduplicate more code between DRC and copying GcCompiler implementations

wasm-proposal:gcIssues with the implementation of the gc wasm proposalIssues with the implementation of the gc wasm proposal

Status: Open.

#13113 In bytecodealliance/wasmtime;

· fitzgen opened on Apr 15, 2026

Should accesses to the GC heap use MemFlags::trusted()?

wasm-proposal:gcIssues with the implementation of the gc wasm proposalIssues with the implementation of the gc wasm proposal

Status: Open.

#13112 In bytecodealliance/wasmtime;

· fitzgen opened on Apr 15, 2026

Spurious "indirect call type mismatch" trap when calling an imported function at its actual subtype

bugIncorrect behavior in the current implementation that needs fixingIncorrect behavior in the current implementation that needs fixing

wasm-proposal:gcIssues with the implementation of the gc wasm proposalIssues with the implementation of the gc wasm proposal

Status: Open.

#13095 In bytecodealliance/wasmtime;

· shumbo opened on Apr 14, 2026

riscv64: The vxrm and vxsat registers are not preserved or handled

cranelift:area:riscv64Issues related to the RISC-V 64 backend.Issues related to the RISC-V 64 backend.

Status: Open.

#13078 In bytecodealliance/wasmtime;

· alexcrichton opened on Apr 13, 2026

riscv64: Atomics for 8/16-bit values incorrectly have two atomic loads

cranelift:area:riscv64Issues related to the RISC-V 64 backend.Issues related to the RISC-V 64 backend.

wasm-proposal:threadsIssues related to the WebAssembly threads proposalIssues related to the WebAssembly threads proposal

Status: Open.

#13076 In bytecodealliance/wasmtime;

· alexcrichton opened on Apr 13, 2026

Prefetch instruction for Cranelift

craneliftIssues related to the Cranelift code generatorIssues related to the Cranelift code generator

cranelift:area:clif

Status: Open.

#13075 In bytecodealliance/wasmtime;

· tareksander opened on Apr 13, 2026

DRC panic where passive table elements are GC'd too soon

wasm-proposal:gcIssues with the implementation of the gc wasm proposalIssues with the implementation of the gc wasm proposal

Status: Open.

#13066 In bytecodealliance/wasmtime;

· alexcrichton opened on Apr 13, 2026

Passing GC objects multiple times to wasm can cause leaks/refcount corruption

wasm-proposal:gcIssues with the implementation of the gc wasm proposalIssues with the implementation of the gc wasm proposal

Status: Open.

#13037 In bytecodealliance/wasmtime;

· alexcrichton opened on Apr 10, 2026

Large constant GC array causes runtime panics in a few ways

wasm-proposal:gcIssues with the implementation of the gc wasm proposalIssues with the implementation of the gc wasm proposal

Status: Open.

#13034 In bytecodealliance/wasmtime;

· alexcrichton opened on Apr 10, 2026