Allocation of Resources Without Limits or Throttling Affecting wasmtime package, versions <36.0.16>=37.0.0 <48.0.3>=49.0.0 <49.0.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsSnyk Learn
Learn about Allocation of Resources Without Limits or Throttling vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-RUST-WASMTIME-21708538
- published25 Oct 2026
- disclosed22 Oct 2026
- creditUnknown
Introduced: 22 Oct 2026
NewCVE-2026-115389 (opens in a new tab)How to fix?
Upgrade wasmtime to version 36.0.16, 48.0.3, 49.0.1 or higher.
Overview
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the Val API when lifting guest values, which does not properly account for host allocations and allows bypassing the hostcall fuel limit. An attacker can exhaust host memory resources by returning specially crafted values from a malicious WebAssembly guest, leading to service disruption.