high7.9
CVE-2026-118688
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 o…
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| Wasmtime | before 36.0.18 |
| 37.0.0 | before 48.0.6 |
| And 49.0.0 | before 49.0.3 |
Versions were read from the advisory text. No structured product data has been published for this record yet.