---
id: RUSTSEC-2026-0315
aliases:
  - GHSA-m63x-6p34-q65x
title: >-
  `call_ref` and exception `catch` can drop some fuel accounting, leading to
  exponential fuel amplification
summary: >-
  `call_ref` and exception `catch` can drop some fuel accounting, leading to
  exponential fuel amplification
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, < 49.0.1'
patched:
  - wasmtime 49.0.1
published: '2026-09-24'
updated: '2026-09-29'
sourceUpdated: '2026-09-29T07:45:02.389858040Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/RUSTSEC-2026-0315'
references:
  - url: 'https://crates.io/crates/wasmtime'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2026-0315.html'
  - url: 'https://github.com/bytecodealliance/wasmtime/pull/14407'
tags:
  - osv
  - rust
ingestedAt: '2026-09-30T07:22:02.091Z'
---

## Overview

This is an entry in the RustSec database for the Wasmtime security advisory
located at
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-m63x-6p34-q65x
For more information see the GitHub-hosted security advisory.

## Affected packages

- `wasmtime >= 49.0.0, < 49.0.1`

## Remediation

Upgrade to a patched release:

- `wasmtime 49.0.1`