---
id: CVE-2026-115379
aliases:
  - RUSTSEC-2026-0326
  - GHSA-hw8m-q44c-ggrf
title: >-
  Rooting for GC values live across `try_call` may be missing, causing GC heap
  corruption
summary: >-
  Rooting for GC values live across `try_call` may be missing, causing GC heap
  corruption
severity: medium
cvss: 5.7
cvssVector: 'CVSS:3.1/AV:N/AC:L/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-2026-0326'
references:
  - url: 'https://crates.io/crates/wasmtime'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2026-0326.html'
  - url: 'https://github.com/bytecodealliance/wasmtime/pull/14478'
  - url: >-
      https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-hw8m-q44c-ggrf
    label: GitHub Security Advisory (GHSA-hw8m-q44c-ggrf)
  - 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-try-call
    label: >-
      VulnCheck Advisory: Wasmtime 47.0.0 before 48.0.4 and 49.0.0 before 49.0.2
      GC Heap Corruption via try_call
tags:
  - osv
  - rust
  - cve.org
epss: 0.00278
epssPercentile: 0.20318
cwe:
  - CWE-416
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-hw8m-q44c-ggrf
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`