Description


wasmtime-wasi in Wasmtime before 36.0.18, 37.0.0 before 48.0.6, and 49.0.0 before 49.0.3 re-appends a trailing slash to rename source paths, causing renameat on macOS and FreeBSD hosts to follow directory symlinks. A guest with sandbox write access can rename a relative symlink such as "up/" to move host directories into its sandbox and read or write them.

Related CPE's


Could not find any relations

Weaknesses



CWE-61

CVSS impact metrics


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

7.9 · High

Information


Source identifier

[email protected]

Vulnerability status

Deferred

Published

2026-10-28T19:17:35.973Z

2 hours ago

Last modified

2026-10-28T19:17:36.090Z

2 hours ago