Use of Uninitialized Resource Affecting wasmtime-wasi package, versions <36.0.17>=37.0.0 <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-2026-115386 (opens in a new tab)How to fix?
Upgrade wasmtime-wasi to version 36.0.17, 48.0.4, 49.0.2 or higher.
Overview
wasmtime-wasi is a Crate defining the Wasi type for Wasmtime, which represents a WASI instance which may be added to a linker.
Affected versions of this package are vulnerable to Use of Uninitialized Resource via the fd_readdir process. An attacker can access unintended memory contents by listing directory entries in a preopened directory, resulting in exposure of leftover host stack or heap memory.