{"id":"CVE-2026-54591","summary":"AsyncSSH: SCP Path Traversal to Arbitrary File Write","details":"AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python asyncio framework. Prior to 2.23.1, a malicious SSH server can write arbitrary files on the asyncssh SCP client's filesystem by sending filenames containing ../ traversal sequences because _parse_cd_args in scp.py returns server-provided names verbatim and _recv_files joins them to the destination path without enforcing the target directory boundary. This issue is fixed in version 2.23.1.","aliases":["GHSA-2wxc-x7rj-hg8f"],"modified":"2026-07-15T01:49:17.385728008Z","published":"2026-07-08T20:33:57.420Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54591.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-22"]},"references":[{"type":"WEB","url":"https://github.com/ronf/asyncssh/releases/tag/v2.23.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54591.json"},{"type":"ADVISORY","url":"https://github.com/ronf/asyncssh/security/advisories/GHSA-2wxc-x7rj-hg8f"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54591"},{"type":"FIX","url":"https://github.com/ronf/asyncssh/commit/d730803b8e4e94c20c7580d90f94d1e05f9f58de"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ronf/asyncssh","events":[{"introduced":"0"},{"fixed":"d730803b8e4e94c20c7580d90f94d1e05f9f58de"},{"fixed":"1b5839f3827f7bf546fc311cc8da77788a9d22f7"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"2.23.1"}]}}],"versions":["v2.23.0","v2.22.0","v2.21.1","v2.21.0","v2.20.0","v2.19.0","v2.18.0","v2.17.0","v2.16.0","v2.15.0","v2.14.2","v2.14.1","v2.14.0","v2.13.2","v2.13.1","v2.13.0","v2.12.0","v2.11.0","v2.10.1","v2.10.0","v2.9.0","v2.8.1","v2.8.0","v2.7.2","v2.7.1","v2.7.0","v2.6.0","v2.5.0","v2.4.2","v2.4.1","v2.4.0","v2.3.0","v2.2.1","v2.2.0","v2.1.0","v2.0.1","v2.0.0","v1.18.0","v1.17.1","v1.17.0","v1.16.1","v1.16.0","v1.15.1","v1.15.0","v1.14.0","v1.13.3","v1.13.2","v1.13.1","v1.13.0","v1.12.2","v1.12.1","v1.12.0","v1.11.1","v1.11.0","v1.10.1","v1.10.0","v1.9.0","v1.8.1","v1.8.0","v1.7.3","v1.7.2","v1.7.1","v1.6.2","v1.6.1","v1.6.0","v1.5.6","v1.5.5","v1.5.4","v1.5.3","v1.5.2","v1.5.1","v1.5.0","v1.4.1","v1.4.0","v1.3.2","v1.3.1","v1.3.0","v1.2.1","v1.2.0","v1.1.1","v1.1.0","v1.0.1","v1.0.0","v0.9.2","v0.9.1","v0.9.0","v0.8.4","v0.8.3","v0.8.2","v0.8.1","v0.8.0","v0.7.0","v0.6.0","v0.5.0","v0.4.0","v0.3.0","v0.2.0","v0.1.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54591.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H"}]}