Vulnerability Details CVE-2026-45309
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 2.23.0, AsyncSSH expands the OpenSSH-compatible AuthorizedKeysFile %u token in asyncssh/config.py, asyncssh/connection.py, asyncssh/auth_keys.py, and asyncssh/misc.py with the raw SSH username during pre-authentication server config reload, allowing a server configured with AuthorizedKeysFile authorized_keys/%u to read an authorized-keys file outside the intended directory when the SSH username contains /, \, or .. path traversal segments and authenticate with an attacker-selected key file. This issue is fixed in version 2.23.0.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 35.7%
CVSS Severity
CVSS v3 Score 7.5
References
- https://github.com/ronf/asyncssh/commit/2af2382cce946c959a378a62f257af253dc4ab51
- https://github.com/ronf/asyncssh/commit/3d515ba9ba0cd9990d248bdf62bcf05d51261a88
- https://github.com/ronf/asyncssh/security/advisories/GHSA-g794-3fmp-753h
- https://github.com/ronf/asyncssh/security/advisories/GHSA-g794-3fmp-753h
Products affected by CVE-2026-45309
-
cpe:2.3:a:asyncssh_project:asyncssh:0.1.0
-
cpe:2.3:a:asyncssh_project:asyncssh:0.2.0
-
cpe:2.3:a:asyncssh_project:asyncssh:0.3.0
-
cpe:2.3:a:asyncssh_project:asyncssh:0.4.0
-
cpe:2.3:a:asyncssh_project:asyncssh:0.5.0
-
cpe:2.3:a:asyncssh_project:asyncssh:0.6.0
-
cpe:2.3:a:asyncssh_project:asyncssh:0.7.0
-
cpe:2.3:a:asyncssh_project:asyncssh:0.8.0
-
cpe:2.3:a:asyncssh_project:asyncssh:0.8.1
-
cpe:2.3:a:asyncssh_project:asyncssh:0.8.2
-
cpe:2.3:a:asyncssh_project:asyncssh:0.8.3
-
cpe:2.3:a:asyncssh_project:asyncssh:0.8.4
-
cpe:2.3:a:asyncssh_project:asyncssh:0.9.0
-
cpe:2.3:a:asyncssh_project:asyncssh:0.9.1
-
cpe:2.3:a:asyncssh_project:asyncssh:0.9.2
-
cpe:2.3:a:asyncssh_project:asyncssh:1.0.0
-
cpe:2.3:a:asyncssh_project:asyncssh:1.0.1
-
cpe:2.3:a:asyncssh_project:asyncssh:1.1.0
-
cpe:2.3:a:asyncssh_project:asyncssh:1.1.1
-
cpe:2.3:a:asyncssh_project:asyncssh:1.10.0
-
cpe:2.3:a:asyncssh_project:asyncssh:1.10.1
-
cpe:2.3:a:asyncssh_project:asyncssh:1.11.0
-
cpe:2.3:a:asyncssh_project:asyncssh:1.11.1
-
cpe:2.3:a:asyncssh_project:asyncssh:1.12.0
-
cpe:2.3:a:asyncssh_project:asyncssh:1.12.1
-
cpe:2.3:a:asyncssh_project:asyncssh:1.2.0
-
cpe:2.3:a:asyncssh_project:asyncssh:1.2.1
-
cpe:2.3:a:asyncssh_project:asyncssh:1.3.0
-
cpe:2.3:a:asyncssh_project:asyncssh:1.3.1
-
cpe:2.3:a:asyncssh_project:asyncssh:1.3.2
-
cpe:2.3:a:asyncssh_project:asyncssh:1.4.0
-
cpe:2.3:a:asyncssh_project:asyncssh:1.4.1
-
cpe:2.3:a:asyncssh_project:asyncssh:1.5.0
-
cpe:2.3:a:asyncssh_project:asyncssh:1.5.1
-
cpe:2.3:a:asyncssh_project:asyncssh:1.5.2
-
cpe:2.3:a:asyncssh_project:asyncssh:1.5.3
-
cpe:2.3:a:asyncssh_project:asyncssh:1.5.4
-
cpe:2.3:a:asyncssh_project:asyncssh:1.5.5
-
cpe:2.3:a:asyncssh_project:asyncssh:1.5.6
-
cpe:2.3:a:asyncssh_project:asyncssh:1.6.0
-
cpe:2.3:a:asyncssh_project:asyncssh:1.6.1
-
cpe:2.3:a:asyncssh_project:asyncssh:1.6.2
-
cpe:2.3:a:asyncssh_project:asyncssh:1.7.0
-
cpe:2.3:a:asyncssh_project:asyncssh:1.7.1
-
cpe:2.3:a:asyncssh_project:asyncssh:1.7.2
-
cpe:2.3:a:asyncssh_project:asyncssh:1.7.3
-
cpe:2.3:a:asyncssh_project:asyncssh:1.8.0
-
cpe:2.3:a:asyncssh_project:asyncssh:1.8.1
-
cpe:2.3:a:asyncssh_project:asyncssh:1.9.0
-
cpe:2.3:a:asyncssh_project:asyncssh:2.14.0
-
cpe:2.3:a:asyncssh_project:asyncssh:2.14.1
-
cpe:2.3:a:asyncssh_project:asyncssh:2.15.0
-
cpe:2.3:a:asyncssh_project:asyncssh:2.16.0
-
cpe:2.3:a:asyncssh_project:asyncssh:2.17.0
-
cpe:2.3:a:asyncssh_project:asyncssh:2.18.0
-
cpe:2.3:a:asyncssh_project:asyncssh:2.19.0
-
cpe:2.3:a:asyncssh_project:asyncssh:2.20.0
-
cpe:2.3:a:asyncssh_project:asyncssh:2.21.0
-
cpe:2.3:a:asyncssh_project:asyncssh:2.21.1
-
cpe:2.3:a:asyncssh_project:asyncssh:2.22.0