---
id: RUSTSEC-2026-0356
aliases:
  - GHSA-7v24-42x9-pxf7
title: Panic on erroneous call-to-host from guest realloc call
summary: Panic on erroneous call-to-host from guest realloc call
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'
vendor: wasmtime
product: wasmtime
ecosystem: rust
affected:
  - 'wasmtime >= 49.0.0, < 49.0.3'
patched:
  - wasmtime 49.0.3
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T20:30:02.543558021Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/RUSTSEC-2026-0356'
references:
  - url: 'https://crates.io/crates/wasmtime'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2026-0356.html'
  - url: 'https://github.com/bytecodealliance/wasmtime/pull/14739'
tags:
  - osv
  - rust
ingestedAt: '2026-10-15T11:47:08.233Z'
---

## Overview

This is an entry in the RustSec database for the Wasmtime security advisory
located at
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-7v24-42x9-pxf7
For more information see the GitHub-hosted security advisory.

## Affected packages

- `wasmtime >= 49.0.0, < 49.0.3`

## Remediation

Upgrade to a patched release:

- `wasmtime 49.0.3`