---
id: CVE-2026-34988
aliases:
  - RUSTSEC-2026-0088
  - GHSA-6wgr-89rj-399p
title: Data leakage between pooling allocator instances
summary: Data leakage between pooling allocator instances
severity: none
vendor: wasmtime
product: wasmtime
ecosystem: rust
affected:
  - 'wasmtime >= 43.0.0, < 43.0.1'
patched:
  - wasmtime 43.0.1
published: '2026-04-09'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T18:00:14.305407755Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/RUSTSEC-2026-0088'
references:
  - url: 'https://crates.io/crates/wasmtime'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2026-0088.html'
  - url: 'https://github.com/bytecodealliance/wasmtime/pull/13008'
tags:
  - osv
  - rust
epss: 0.00303
epssPercentile: 0.21298
ingestedAt: '2026-10-13T11:45:30.186Z'
---

## Overview

This is an entry in the RustSec database for the Wasmtime security advisory
located at
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-6wgr-89rj-399p
For more information see the GitHub-hosted security advisory.

## Affected packages

- `wasmtime >= 43.0.0, < 43.0.1`

## Remediation

Upgrade to a patched release:

- `wasmtime 43.0.1`