Description
`ant-releases` downloads and unpacks release archives from the `safe_network` / `autonomi` repositories. When it extracts an archive, it builds each output path by joining the archive entry's **own name** onto the destination directory, with no check
for `..` or absolute components — a classic "zip-slip" path traversal (CWE-22 / CWE-23). A crafted archive can therefore create or overwrite files outside the intended extraction directory.
In `extract_release_archive` (`src/lib.rs`), the ZIP branch does:
```rust
let out_path = dest_dir_path.join(file.name()); // raw zip entry name, no containment check
if file.name().ends_with('/') {
std::fs::create_dir_all(&out_path)?; // dir created outside dest_dir
} else {
let mut outfile = std::fs::File::create(&out_path)?; // file written outside dest_dir
std::io::copy(&mut file, &mut outfile)?;
}
```
## Proof of concept
A one-entry ZIP whose entry name is `../foo_pwned.txt`, passed to `AntReleaseRepoActions::extract_release_archive` (obtained via the crate's public `<dyn AntReleaseRepoActions>::default_config()`), writes `foo_pwned.txt` as a sibling of
the destination directory, outside it. Confirmed against the published `0.4.3` crate.
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| crates.io | ant-releases | >= 0.0.0-0 | — | RUSTSEC-2026-0434 |