---
id: CVE-2026-115383
aliases:
  - RUSTSEC-2026-0325
  - GHSA-cfhf-m2cr-62wj
title: Mis-typed WebAssembly tag imports can lead to GC heap corruption
summary: Mis-typed WebAssembly tag imports can lead to GC heap corruption
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H'
vendor: wasmtime
product: wasmtime
ecosystem: rust
affected:
  - 'wasmtime >= 49.0.0, < 49.0.2'
patched:
  - wasmtime 49.0.2
published: '2026-10-02'
updated: '2026-10-24'
sourceUpdated: '2026-10-24T06:25:41Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/RUSTSEC-2026-0325'
references:
  - url: 'https://crates.io/crates/wasmtime'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2026-0325.html'
  - url: 'https://github.com/bytecodealliance/wasmtime/pull/14471'
  - url: >-
      https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-cfhf-m2cr-62wj
    label: GitHub Security Advisory (GHSA-cfhf-m2cr-62wj)
  - url: >-
      https://www.vulncheck.com/advisories/wasmtime-47.0.0-before-48.0.4-and-49.0.0-before-49.0.2-gc-heap-corruption-via-tag-imports
    label: >-
      VulnCheck Advisory: Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2
      GC Heap Corruption via Tag Imports
tags:
  - osv
  - rust
  - cve.org
epss: 0.00184
epssPercentile: 0.07866
cvssSource: cna
cwe:
  - CWE-1287
ingestedAt: '2026-10-22T22:00:50.403Z'
---

## Overview

This is an entry in the RustSec database for the Wasmtime security advisory
located at
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-cfhf-m2cr-62wj
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`