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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/ronf/asyncssh/security/advisories/GHSA-2wxc-x7rj-hg8f
X_Refsource_Misc x_refsource_misc
https://github.com/ronf/asyncssh/commit/d730803b8e4e94c20c7580d90f94d1e05f9f58de
X_Refsource_Misc x_refsource_misc
https://github.com/ronf/asyncssh/releases/tag/v2.23.1
Scores
CVSS v3
8.1
EPSS
0.0031
EPSS Percentile
23.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-22
Status
published
Products (1)
ronf/asyncssh
< 2.23.1
Published
Jul 08, 2026
Tracked Since
Jul 09, 2026