{"id":"CVE-2026-61725","state":"PUBLISHED","title":"sevenz-rust2: unchecked 7z entry paths permit traversal and absolute-path file overwrites","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.","publishedAt":"2026-10-30T22:10:55.526Z","updatedAt":"2026-10-30T22:10:55.526Z","severity":{"score":6.1,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["hasenbanck sevenz-rust2"],"affected":[{"vendor":"hasenbanck","product":"sevenz-rust2","versions":[{"version":"< 0.21.1","status":"affected"}]}],"references":["https://github.com/hasenbanck/sevenz-rust2/security/advisories/GHSA-qh76-45cr-8xrc","https://github.com/hasenbanck/sevenz-rust2/commit/ef760b61f3535ac8b93006212aef41bfebc237eb"],"weaknesses":["CWE-22","CWE-23"],"ingestedAt":"2026-10-30T22:16:06.501Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/61xxx/CVE-2026-61725.json","commit":"226652b7321cd45ef01add6f464a8114b52515e5","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-61725","state":"PUBLISHED","datePublished":"2026-10-30T22:10:55.526Z","dateUpdated":"2026-10-30T22:10:55.526Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-10T18:59:00.046Z"},"containers":{"cna":{"title":"sevenz-rust2: unchecked 7z entry paths permit traversal and absolute-path file overwrites","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"hasenbanck","product":"sevenz-rust2","versions":[{"version":"< 0.21.1","status":"affected"}]}],"references":[{"url":"https://github.com/hasenbanck/sevenz-rust2/security/advisories/GHSA-qh76-45cr-8xrc","name":"https://github.com/hasenbanck/sevenz-rust2/security/advisories/GHSA-qh76-45cr-8xrc","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/hasenbanck/sevenz-rust2/commit/ef760b61f3535ac8b93006212aef41bfebc237eb","name":"https://github.com/hasenbanck/sevenz-rust2/commit/ef760b61f3535ac8b93006212aef41bfebc237eb","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"LOW","baseScore":6.1,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-23","lang":"en","description":"CWE-23: Relative Path Traversal","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-30T22:10:55.526Z"},"source":{"advisory":"GHSA-qh76-45cr-8xrc","discovery":"UNKNOWN"}}}}}