{"id":"CVE-2026-61725","title":"sevenz-rust2: unchecked 7z entry paths permit traversal and absolute-path file overwrites","summary":"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` co…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L","cvssSource":"cna","cwe":["CWE-22","CWE-23"],"vendor":"hasenbanck","product":"sevenz-rust2","affected":["sevenz-rust2 < 0.21.1"],"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-02T14:45:51.198089Z"},"exploitAvailable":true,"published":"2026-10-30","updated":"2026-11-02","sourceUpdated":"2026-11-02T14:46:18.025Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-61725","references":[{"url":"https://github.com/hasenbanck/sevenz-rust2/security/advisories/GHSA-qh76-45cr-8xrc","label":"https://github.com/hasenbanck/sevenz-rust2/security/advisories/GHSA-qh76-45cr-8xrc"},{"url":"https://github.com/hasenbanck/sevenz-rust2/commit/ef760b61f3535ac8b93006212aef41bfebc237eb","label":"https://github.com/hasenbanck/sevenz-rust2/commit/ef760b61f3535ac8b93006212aef41bfebc237eb"}],"tags":["cve.org","exploit-available"],"epss":0.00138,"epssPercentile":0.03193,"ingestedAt":"2026-11-05T19:30:42.673Z","slug":"CVE-2026-61725","body":"## Overview\n\nsevenz-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.\n\n## Affected\n\n- `sevenz-rust2 < 0.21.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}