CVE-2026-54591
High · 8.1CVSS
8.1
EPSS
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Published
Jul 8, 2026
CISA due date
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The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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