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
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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)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
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.