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 framework. Version 2.23.0 contains an incomplete fix for CVE-2026-45309 in SSHServerConfig.settokens that blocks /, , and .. before %u substitution in...

UBUNTU-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 framework. Version 2.23.0 contains an incomplete fix for CVE-2026-45309 in SSHServerConfig.settokens that blocks /, , and .. before %u substitution in...

UBUNTU-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 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 ../...

CVE-2026-54590 AsyncSSH AuthorizedKeysFile username substitution bypass through ~ and environment expansion

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.settokens that blocks /, , and .. before %u substitution in...

EUVD-2026-42400

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.settokens that blocks /, , and .. before %u substitution in...

CVE-2026-54590 AsyncSSH AuthorizedKeysFile username substitution bypass through ~ and environment expansion

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.settokens that blocks /, , and .. before %u substitution in...

CVE-2026-54590

AsyncSSH (Python, v2.23.0) contains an incomplete fix for CVE-2026-45309 in SSHServerConfig._set_tokens that blocks /, , and .. before %u substitution in AuthorizedKeysFile but fails to block a leading ~ or ${ENV}. This allows later expansion in _expand_val and Path(filename).expanduser() to esca...

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 framework. Version 2.23.0 contains an incomplete fix for CVE-2026-45309 in SSHServerConfig.settokens that blocks /, , and .. before %u substitution in...

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 framework. Version 2.23.0 contains an incomplete fix for CVE-2026-45309 in SSHServerConfig.settokens that blocks /, , and .. before %u substitution in...

CVE-2026-54590 AsyncSSH AuthorizedKeysFile username substitution bypass through ~ and environment expansion

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.settokens that blocks /, , and .. before %u substitution in...

CVE-2026-54591

AsyncSSH (Python) prior to 2.23.1 is vulnerable to SCP path traversal: a malicious SSH server can craft filenames with ../, since _parse_cd_args returns server-provided names verbatim and _recv_files joins them to the destination path without enforcing directory boundaries, enabling arbitrary fil...

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 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 ../...

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 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 ../...

CVE-2026-54591 AsyncSSH: SCP Path Traversal to Arbitrary File Write

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 ../...

PT-2026-56578

Name of the Vulnerable Software and Affected Versions AsyncSSH versions prior to 2.23.1 Description AsyncSSH is a Python package providing an asynchronous client and server implementation of the SSHv2 protocol. A malicious SSH server can write arbitrary files on the SCP client's filesystem by...

PT-2026-56577

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...

OPENSUSE-SU-2026:11042-1 python311-asyncssh-2.23.1-1.1 on GA media

These are all security issues fixed in the python311-asyncssh-2.23.1-1.1 package on the GA media of openSUSE Tumbleweed...

GHSA-G794-3FMP-753H AsyncSSH `AuthorizedKeysFile %u` path traversal allows attacker-selected authorized keys to authenticate a traversal username

Summary AsyncSSH 2.22.0 expands the OpenSSH-compatible AuthorizedKeysFile %u token with the raw SSH username during pre-authentication server config reload. A server configured with a documented per-user key pattern such as AuthorizedKeysFile authorizedkeys/%u can be made to read an authorized-ke...

PT-2026-44151

Name of the Vulnerable Software and Affected Versions asyncssh versions 2.22.0 through 2.23.0 Description An issue exists during pre-authentication server configuration reload where the %u token in the AuthorizedKeysFile setting is expanded using the raw SSH username without rejecting path...

Security Bulletin: IBM Storage Ceph is vulnerable to a Rogue Session Attack and Rogue Extension Negotiation in python-asyncssh (CVE-2023-46446, CVE-2023-46445)

Summary python-asyncssh is used by IBM Storage Ceph as an asynchronous client and server implementation of the SSHv2 protocol. CVE-2023-46446, CVE-2023-46445 Vulnerability Details CVEID:CVE-2023-46446 DESCRIPTION: An issue in AsyncSSH before 2.14.1 allows attackers to control the remote end of an...