Vulnerability Description
sevenz-rust2 is a Rust-native 7z compressor and `decompress`or. Prior to 0.21.1, extracting an attacker-supplied 7z archive can write or overwrite files outside the destination directory. In `src/util/decompress.rs`, `decompress_impl` computes each destination with `dest.join(entry.name())` without normalizing the archive's UTF-16 entry name or verifying containment, and `default_entry_extract_fn` writes to it with `File::create`. Parent-directory components escape the extraction root, and an absolute entry path makes the join discard the destination entirely. The convenience entry points `decompress`, `decompress_file`, `decompress_with_password`, and `decompress_file_with_password` all use this default path. Overwriting writable configuration, startup, cron, or build files can lead to code execution or persistence. The archive bytes are the attacker-controlled trust boundary, including for applications that automatically unpack uploaded or otherwise untrusted archives. This issue is fixed in version 0.21.1.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/hasenbanck/sevenz-rust2/commit/ef760b61f3535ac8b93006212aef41
- https://github.com/hasenbanck/sevenz-rust2/security/advisories/GHSA-qh76-45cr-8x
FAQ
What is CVE-2026-61725?
CVE-2026-61725 is a vulnerability with a CVSS score of 6.1 (MEDIUM). sevenz-rust2 is a Rust-native 7z compressor and `decompress`or. Prior to 0.21.1, extracting an attacker-supplied 7z archive can write or overwrite files outside the destination directory. In `src/util...
How severe is CVE-2026-61725?
CVE-2026-61725 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-61725?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.