---
title: "CVE-2026-115392: Wasmtime - Sandbox Escape"
description: "Wasmtime < 24.0.13, 25.0.0 < 36.0.14, 37.0.0 < 46.0.3, and 47.0.0 < 47.0.4 contain a filesystem sandbox escape caused by mishandling symlinks with trailing slashes in cap-std dependency on macOS and Linux kernels lacking openat2, letting guest users with write access read/write host files, exploit requires guest write access to sandboxed directory."
url: https://panop.io/threat-heartbeat/CVE-2026-115392/
---

# CVE-2026-115392 Wasmtime - Sandbox Escape

Wasmtime < 24.0.13, 25.0.0 < 36.0.14, 37.0.0 < 46.0.3, and 47.0.0 < 47.0.4 contain a filesystem sandbox escape caused by mishandling symlinks with trailing slashes in cap-std dependency on macOS and Linux kernels lacking openat2, letting guest users with write access read/write host files, exploit requires guest write access to sandboxed directory.

CVSS base score 7.9 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-115392)

## Details

Type

Sandbox Escape

Impact

File System Read, File System Write, Information Disclosure, Data Tampering

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:L

Published

22 October 2026

Updated

23 October 2026

Weakness

[CWE-61](https://cwe.mitre.org/data/definitions/61.html)

## Vendor fix

Update to versions 24.0.13, 36.0.14, 46.0.3, 47.0.4 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-115392](https://nvd.nist.gov/vuln/detail/CVE-2026-115392)
- [https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-vqjp-4c8c-hfgg](https://github.com/bytecodealliance/wasmtime/security/advisories/GHSA-vqjp-4c8c-hfgg)
- [https://www.vulncheck.com/advisories/wasmtime-before-24.0.13-25.0.0-before-36.0.14-37.0.0-before-46.0.3-and-47.0.0-before-47.0.4-sandbox-escape-via-trailing-slashes](https://www.vulncheck.com/advisories/wasmtime-before-24.0.13-25.0.0-before-36.0.14-37.0.0-before-46.0.3-and-47.0.0-before-47.0.4-sandbox-escape-via-trailing-slashes)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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