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 asyn
CVSS
5.9
Medio
EPSS
0.3%
p21
KEV
—
Exploit Today
6
0-100
Publicado: 8 jul 2026 · Última mod.: 10 jul 2026 · CWE-22 · CWE-639
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.
- github.comhttps://github.com/ronf/asyncssh/commit/3d515ba9ba0cd9990d248bdf62bcf05d51261a88
- github.comhttps://github.com/ronf/asyncssh/releases/tag/v2.23.1
- github.comhttps://github.com/ronf/asyncssh/security/advisories/GHSA-qr67-gv47-xwwh
- github.comhttps://github.com/ronf/asyncssh/security/advisories/GHSA-qr67-gv47-xwwh