---
id: CVE-2023-26489
aliases:
  - RUSTSEC-2023-0090
  - GHSA-ff4p-7xrq-q5r8
title: Guest-controlled out-of-bounds read/write on x86\_64
summary: Guest-controlled out-of-bounds read/write on x86\_64
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
vendor: wasmtime
product: wasmtime
ecosystem: rust
affected:
  - 'wasmtime >= 6.0.0, < 6.0.1'
patched:
  - wasmtime 6.0.1
published: '2023-03-02'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T18:00:06.452316813Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/RUSTSEC-2023-0090'
references:
  - url: 'https://crates.io/crates/wasmtime'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2023-0090.html'
  - url: >-
      https://github.com/bytecodealliance/wasmtime/commit/63fb30e4b4415455d47b3da5a19d79c12f4f2d1f
tags:
  - osv
  - rust
epss: 0.01251
epssPercentile: 0.6926
ingestedAt: '2026-10-13T11:45:30.162Z'
---

## Overview

This is an entry in the RustSec database for the Wasmtime security advisory
located at
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-ff4p-7xrq-q5r8.
For more information see the GitHub-hosted security advisory.

## Affected packages

- `wasmtime >= 6.0.0, < 6.0.1`

## Remediation

Upgrade to a patched release:

- `wasmtime 6.0.1`