This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-54590 →
DEBIAN-CVE-2026-54590
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. Version 2.23.0 contains an incomplete fix for CVE-2026-45309 in SSHServerConfig._set_tokens that blocks /, , and .. before %u substitution in AuthorizedKeysFile but does not block a leading ~ or ${ENV}, allowing later expansion in _expand_val and Path(filename).expanduser() to escape the intended authorized-keys directory. This issue is fixed in version 2.23.1.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:14
python-asyncssh
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.24.0-1"}]}]
References
- advisory security-tracker.debian.org