Incorrect Conversion between Numeric Types Affecting wasmtime package, versions >=25.0.0 <36.0.7>=37.0.0 <42.0.2>=43.0.0 <43.0.1
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 applications- Snyk IDSNYK-RUST-WASMTIME-15967401
- published10 Apr 2026
- disclosed9 Apr 2026
- creditUnknown
Introduced: 9 Apr 2026
NewCVE-2026-34945 (opens in a new tab)How to fix?
Upgrade wasmtime to version 36.0.7, 42.0.2, 43.0.1 or higher.
Overview
Affected versions of this package are vulnerable to Incorrect Conversion between Numeric Types of the table.size instruction for 64-bit WebAssembly tables. An attacker can access sensitive data from the host's stack by crafting a malicious WebAssembly guest.