---
id: RUSTSEC-2026-0327
aliases:
  - GHSA-32h6-97mm-8q3c
title: >-
  Wasmtime component async-lifted callback result count is unvalidated, causing
  a native stack buffer overflow
summary: >-
  Wasmtime component async-lifted callback result count is unvalidated, causing
  a native stack buffer overflow
severity: none
vendor: wasmtime
product: wasmtime
ecosystem: rust
affected:
  - 'wasmtime >= 49.0.0, < 49.0.2'
patched:
  - wasmtime 49.0.2
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T20:30:02.598161714Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/RUSTSEC-2026-0327'
references:
  - url: 'https://crates.io/crates/wasmtime'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2026-0327.html'
  - url: 'https://github.com/bytecodealliance/wasmtime/pull/14471'
tags:
  - osv
  - rust
ingestedAt: '2026-10-03T07:26:10.041Z'
---

## Overview

This is an entry in the RustSec database for the Wasmtime security advisory
located at
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-32h6-97mm-8q3c
For more information see the GitHub-hosted security advisory.

## Affected packages

- `wasmtime >= 49.0.0, < 49.0.2`

## Remediation

Upgrade to a patched release:

- `wasmtime 49.0.2`