Out-of-bounds Read Affecting wasmtime package, versions >=29.0.0 <36.0.5>=37.0.0 <40.0.3>=41.0.0 <41.0.1
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-15123974
- published28 Jan 2026
- disclosed27 Jan 2026
- creditLouis Merlin
Introduced: 27 Jan 2026
CVE-2026-24116 (opens in a new tab)How to fix?
Upgrade wasmtime to version 36.0.5, 40.0.3, 41.0.1 or higher.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Read in f64.copysign, on x86-64 platforms with AVX, which may load more bytes than necessary from memory. An attacker can cause the host process to terminate unexpectedly by triggering an uncaught segmentation fault when specific configuration options are set. This is only exploitable if guard pages are enabled and signals-based-traps are disabled.
Workaround
This vulnerability can be mitigated by enabling signals-based-traps.