This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-54591 →
DEBIAN-CVE-2026-54591
AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python asyncio framew...
Original description
The description as published by the source.
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.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
python-asyncssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
python-asyncssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
python-asyncssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.24.0-1"}]}]
References
- advisory security-tracker.debian.org