Use After Free 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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- published25 Oct 2026
- disclosed22 Oct 2026
- creditUnknown
Introduced: 22 Oct 2026
NewCVE-2026-115379 (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 Use After Free in the try_call process. An attacker can cause heap corruption or incorrect execution by supplying specially crafted Wasm modules that trigger garbage collection during execution, leaving stale or dangling references.