---
id: CVE-2026-115387
aliases:
  - RUSTSEC-2026-0314
  - GHSA-j2g9-4prp-pf6h
title: Guest can panic host through filesystem datetime overflow
summary: Guest can panic host through filesystem datetime overflow
severity: medium
cvss: 6.2
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
vendor: wasmtime-wasi
product: wasmtime-wasi
ecosystem: rust
affected:
  - 'wasmtime-wasi >= 49.0.0, < 49.0.1'
patched:
  - wasmtime-wasi 49.0.1
published: '2026-09-24'
updated: '2026-10-24'
sourceUpdated: '2026-10-24T06:25:41Z'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/RUSTSEC-2026-0314'
references:
  - url: 'https://crates.io/crates/wasmtime-wasi'
  - url: 'https://rustsec.org/advisories/RUSTSEC-2026-0314.html'
  - url: 'https://github.com/bytecodealliance/wasmtime/pull/14403'
  - url: >-
      https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j2g9-4prp-pf6h
    label: GitHub Security Advisory (GHSA-j2g9-4prp-pf6h)
  - url: >-
      https://www.vulncheck.com/advisories/wasmtime-before-36.0.16-37.0.0-before-48.0.3-and-49.0.0-before-49.0.1-host-panic-via-wasi-filesystem-timestamp-overflow
    label: >-
      VulnCheck Advisory: Wasmtime before 36.0.16, 37.0.0 before 48.0.3, and
      49.0.0 before 49.0.1 Host Panic via WASI Filesystem Timestamp Overflow
tags:
  - osv
  - rust
  - cve.org
epss: 0.00112
epssPercentile: 0.01394
cwe:
  - CWE-190
ingestedAt: '2026-10-22T22:00:50.405Z'
---

## Overview

This is an entry in the RustSec database for the Wasmtime security advisory
located at
https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-j2g9-4prp-pf6h
For more information see the GitHub-hosted security advisory.

## Affected packages

- `wasmtime-wasi >= 49.0.0, < 49.0.1`

## Remediation

Upgrade to a patched release:

- `wasmtime-wasi 49.0.1`