# CVE-2026-58494

## Summary

- **CVE ID:** CVE-2026-58494
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N)
- **CWE:** CWE-281, CWE-863
- **Published:** Jul 8, 2026
- **Last Modified:** Jul 9, 2026

## Description

Wasmtime is a runtime for WebAssembly. Prior to 24.0.11, 36.0.12, 45.0.3, and 46.0.1, wasmtime-wasi hard-link creation and renaming check directory permissions but not matching FilePerms on source and destination preopens, allowing a WASI guest with a read-only source file capability to overwrite host files exposed as FilePerms::READ through wasip1, wasip2, or wasip3 filesystem interfaces. This issue is fixed in versions 24.0.11, 36.0.12, 45.0.3, and 46.0.1.

## Affected Products

- bytecodealliance — wasmtime (< 24.0.11)
- bytecodealliance — wasmtime (>= 25.0.0, < 36.0.12)
- bytecodealliance — wasmtime (>= 37.0.0, < 45.0.3)
- bytecodealliance — wasmtime (>= 46.0.0, < 46.0.1)

## References

- [CNA](https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-4ch3-9j33-3pmj)
- [CNA](https://github.com/bytecodealliance/wasmtime/commit/5ddfd5f1ef28f2041fa07d237ad0336e167b0e0c)
- [CNA](https://github.com/bytecodealliance/wasmtime/commit/7db94cdcf0c79cb3dfde884b534b653f2dd83367)
- [CNA](https://github.com/bytecodealliance/wasmtime/commit/8a250aac0962ca1364b5f16525720e9d0b39edcd)
- [CNA](https://github.com/bytecodealliance/wasmtime/commit/d3ceb56ec35f39e02496eeb4e2d9c7f4fb964d9e)
- [CNA](https://github.com/bytecodealliance/wasmtime/releases/tag/v24.0.11)
- [CNA](https://github.com/bytecodealliance/wasmtime/releases/tag/v36.0.12)
- [CNA](https://github.com/bytecodealliance/wasmtime/releases/tag/v45.0.3)
- [CNA](https://github.com/bytecodealliance/wasmtime/releases/tag/v46.0.1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.17%
- **EPSS Percentile:** 6.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._