RUSTSEC-2021-0067: Memory access due to code generation flaw in Cranelift module

What to do

1. See which version you have: cargo tree -i cranelift-codegen (it also shows which of your dependencies pulls it in).
2. Update within your version requirement: cargo update -p cranelift-codegen. If the fix is a newer major or minor than your requirement allows, raise it in Cargo.toml (for example cranelift-codegen = "0.73.1") or update the dependency that pulls it in.
3. Check again with cargo audit, or paste your Cargo.lock into our Cargo.toml checker.

Details from the advisory

There is a bug in 0.73.0 of the Cranelift x64 backend that can create a scenario that could result in a potential sandbox escape in a WebAssembly module. Users of versions 0.73.0 of Cranelift should upgrade to either 0.73.1 or 0.74 to remediate this vulnerability. Users of Cranelift prior to 0.73.0 should update to 0.73.1 or 0.74 if they were not using the old default backend.

More details can be found in the GitHub Security Advisory at:

<https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hpqh-2wqx-7qp5>

References

• Package: crates.io/crates/cranelift-codegen
• Advisory: rustsec.org/advisories/RUSTSEC-2021-0067.html
• Web: github.com/bytecodealliance/wasmtime/commit/95559c01aaa7c061088a433040f31e8291fb09d0

From the RustSec Advisory Database (CC0-1.0) via the OSV export, downloaded Oct 24, 2026. Severity score computed from the published CVSS vector.