Improper Validation of Specified Type of Input Affecting wasmtime package, versions >=47.0.0 <48.0.4>=49.0.0 <49.0.2
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.
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Test your applications- Snyk IDSNYK-RUST-WASMTIME-21708522
- published25 Oct 2026
- disclosed22 Oct 2026
- creditUnknown
Introduced: 22 Oct 2026
NewCVE-2026-115383 (opens in a new tab)How to fix?
Upgrade wasmtime to version 48.0.4, 49.0.2 or higher.
Overview
Affected versions of this package are vulnerable to Improper Validation of Specified Type of Input in the tag import process. An attacker can cause memory corruption and trigger a panic by supplying maliciously crafted WebAssembly components that import tags with a subtype of the original type when the exceptions proposal is enabled.