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CVE-2026-115392

7.9, high

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 allows a filesystem sandbox escape in…

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
7.9, high high CVSS v3.1
EPSS, next 30 days
n/a
Exploitation
No public evidence
Published
22 Oct 2026yesterday

Description

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 allows a filesystem sandbox escape in wasmtime-wasi because its cap-std dependency mishandles symlinks with trailing slashes on macOS and Linux kernels lacking openat2. A guest with write access to any sandboxed directory can read and write any host-accessible file, and read-only guests may read host files via preexisting symlinks.

Details

Vendor
Bytecodealliance
Product
wasmtime
Weakness
CWE-61 (opens in a new tab)
Status
Deferred
Updated
22 Oct 2026
Assigner
disclosure@vulncheck.com

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

References 2

Advisories 1

Other references 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Bytecodealliance CVEs

Every Bytecodealliance CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-115384 Bytecodealliance wasmtime Improper Input Validation Vulnerability 9.9, critical

Beyond this page

Is CVE-2026-115392 in your network?

This page tells you how dangerous CVE-2026-115392 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

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Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 23 Oct 2026, not the live upstream state.