Uncaught Exception Affecting wasmtime package, versions <24.0.7>=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.
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Test your applications- Snyk IDSNYK-RUST-WASMTIME-15967360
- published10 Apr 2026
- disclosed9 Apr 2026
- creditUnknown
Introduced: 9 Apr 2026
NewCVE-2026-34944 (opens in a new tab)How to fix?
Upgrade wasmtime to version 24.0.7, 36.0.7, 42.0.2, 43.0.1 or higher.
Overview
Affected versions of this package are vulnerable to Uncaught Exception in the f64x2.splat instruction compilation on x86-64 platforms with SSE3 disabled. An attacker can cause a segmentation fault and terminate the process by triggering an out-of-bounds read during WebAssembly compilation. This is only exploitable if signals-based traps are disabled.