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Fencer Vulns
high 8.8

RUSTSEC-2026-0427 json

`sn-releases`: `extract_release_archive` writes archive entries without a path-traversal check (zip-slip)

published 2026-10-29 10 d ago modified 2026-10-30 9 d ago

cvss
8.8
version 3.1, OSV
cisa kev
Not listed
not in CISA's catalog
epss
—
no score, EPSS covers CVEs only
public exploits
0
none known

Summary

`SafeReleaseRepoActions::extract_release_archive` builds each output path from the **raw archive entry name** and writes to it with no traversal check, so a malicious release archive can create directories and write files **outside** the destination directory, a "zip-slip" / path traversal (CWE-22 / CWE-23).

In `src/lib.rs` (`extract_release_archive`, zip branch):

```rust let mut file = archive.by_index(i)?; let out_path = dest_dir_path.join(file.name()); // file.name() is the raw entry name if file.name().ends_with('/') { std::fs::create_dir_all(&out_path)?; // no `..` check } else { let mut outfile = std::fs::File::create(&out_path)?; // writes outside dest std::io::copy(&mut file, &mut outfile)?; } ```

The crate is unmaintained (latest release 0.3.1, 2024-10-22) and no fixed version is available.

CVSS scores

assigned by version score vector
OSV 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
crates.io sn-releases
>=0.0.0-0
no fix listed

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.