{"answers":{"affected":"3 open source packages ship an affected version, including asyncssh.","exploited":"There is no known exploitation of CVE-2026-54591 in the wild and no public exploit code.","fix":"Upgrade asyncssh to 2.23.1 or later.","what":"CVE-2026-54591 is a high-severity path traversal vulnerability in ronf asyncssh, published on 8 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-54591 and fix it if it is affected.\n\nWhat it is: CVE-2026-54591 is a high-severity path traversal vulnerability in ronf asyncssh, published on 8 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-54591 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- asyncssh (PyPI): affected all versions; fixed in 2.23.1\n- asyncssh (PyPI): affected all versions; fixed in 2.23.1\n- asyncssh (PyPI): affected all versions; fixed in 2.23.1\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-54591/ (Markdown: https://insights.sbomify.com/CVE-2026-54591/index.md)","id":"CVE-2026-54591","markdown":"https://insights.sbomify.com/CVE-2026-54591/index.md","name":"CVE-2026-54591","record":{"aliases":["CLEANSTART-2026-ZT97378","DEBIAN-CVE-2026-54591","ECHO-ba32-5913-3705","GHSA-2wxc-x7rj-hg8f","MINI-9vjw-g347-8jfv","MINI-fv46-g3fx-9q59","MINI-h6wg-q9ww-xfqr","PYSEC-2026-3808","UBUNTU-CVE-2026-54591"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["data_modify"],"network_reachable":"yes","non_default_config":false,"product_category":"Python SSH library","requires_auth":"none","summary":"A malicious SSH server can write arbitrary files on the AsyncSSH SCP client's filesystem via path traversal sequences in filenames.","user_interaction":"required","vuln_class":"path_traversal"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":8.1,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory"}],"description":"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.","ecosystems":["PyPI"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"AsyncSSH: SCP Path Traversal to Arbitrary File Write","id":"CVE-2026-54591","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"PyPI","product":null,"products":[],"type":"path_traversal","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"Oj: Stack Buffer Overflow in Oj::Doc#each_child via Deeply Nested Input","id":"CVE-2026-54592"},"packages":[{"ecosystem":"PyPI","fixed":["2.23.1"],"introduced":["0"],"last_affected":[],"package":"asyncssh","purl":null,"source":"GHSA-2wxc-x7rj-hg8f"},{"ecosystem":"PyPI","fixed":["2.23.1"],"introduced":["0"],"last_affected":[],"package":"asyncssh","purl":"pkg:pypi/asyncssh","source":"GHSA-2wxc-x7rj-hg8f"},{"ecosystem":"PyPI","fixed":["2.23.1"],"introduced":["0"],"last_affected":[],"package":"asyncssh","purl":"pkg:pypi/asyncssh","source":"PYSEC-2026-3808"}],"prev":{"headline":"AsyncSSH AuthorizedKeysFile username substitution bypass through ~ and environment expansion","id":"CVE-2026-54590"},"products":["asyncssh"],"published":"2026-07-08","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"PyPA Advisory Database","prefix":"PYSEC"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-09","vendors":["ronf"]},"summary":"A malicious SSH server can write arbitrary files on the AsyncSSH SCP client's filesystem via path traversal sequences in filenames.","url":"https://insights.sbomify.com/CVE-2026-54591/"}