CVE-2026-118688 | BDVDB-2026-397394 Detail
bytecodealliancewasmtime
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.
Impact#
Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact low. Attack vector: network.
Weaknesses#
- CWE-61 UNIX Symbolic Link (Symlink) Following
References#
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.