MaccaroniC2

MaccaroniC2 - Empowering Command & Control using AsyncSSH MaccaroniC2 is a proof-of-concept Command and Control framework that utilizes the powerful AsyncSSH Python library which provides an asynchronous client and server implementation of the SSHv2 protocol and use PyNgrok wrapper for ngrok...

GHSA-2WXC-X7RJ-HG8F asyncssh has SCP Path Traversal to Arbitrary File Write

| | | |---|---| | Product | asyncssh all versions through 2.23.0 | | Related | CVE-2019-6111 same class in OpenSSH | | Fix | AsyncSSH 2.23.1 | A malicious SSH server can write arbitrary files on the asyncssh SCP client's filesystem by sending filenames containing ../ traversal sequences. The SCP...

EUVD-2026-42400

asyncssh has an incomplete fix for CVE-2026-45309 — AuthorizedKeysFile %u still escapes the intended directory via a leading and weakly via $ENV username substitution...

GHSA-QR67-GV47-XWWH asyncssh has an incomplete fix for CVE-2026-45309 — AuthorizedKeysFile %u still escapes the intended directory via a leading ~ (and weakly via ${ENV}) username substitution

Incomplete fix for CVE-2026-45309 GHSA-g794-3fmp-753h. The 2.23.0 guard that sanitises the SSH username before %u substitution in AuthorizedKeysFile blocks /, \ and .., but does not block a leading or $ENV, both of which are re-introduced by later expansion and reach the file open — defeating the...

CVE-2026-45309

A flaw was found in AsyncSSH, a Python package for SSHv2 protocol implementation. A remote attacker can exploit a path traversal vulnerability by manipulating the SSH username during pre-authentication. This allows the attacker to read sensitive authorized-keys files from unintended directories,...

Fedora 43 : python-asyncssh (2026-574496d9ae)

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-574496d9ae advisory. import asyncssh 2.23.1 Fix CVE-2026-54590: Unauthorized file modification via authorized-keys directory escape Fix CVE-2026-54591: Arbitrary file...

Fedora 44 : python-asyncssh (2026-1f248487e4)

The remote Fedora 44 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2026-1f248487e4 advisory. update to version 2.24.0 Fix CVE-2026-54590: Unauthorized file modification via authorized-keys directory escape Fix CVE-2026-54591: Arbitrary file...

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,...

CVE-2026-45309 AsyncSSH `AuthorizedKeysFile %u` path traversal allows attacker-selected authorized keys to authenticate a traversal username

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,...

CVE-2026-45309

CVE-2026-45309 affects AsyncSSH prior to 2.23.0. Root cause: the OpenSSH-style token %u in AuthorizedKeysFile was expanded from the remote username without rejecting path separators or .. segments, letting a username such as with traversal characters read an attacker-controlled authorized-keys fi...

CVE-2026-45309 AsyncSSH `AuthorizedKeysFile %u` path traversal allows attacker-selected authorized keys to authenticate a traversal username

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,...

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,...

PYSEC-2026-2384 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...

AsyncSSH `AuthorizedKeysFile %u` path traversal allows attacker-selected authorized keys to authenticate a traversal username

SummaryAsyncSSH 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-key...

PT-2026-59064

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 authorized keys/%u can be made to read an...

Linux Distros Unpatched Vulnerability : CVE-2026-54591

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

Linux Distros Unpatched Vulnerability : CVE-2026-45309

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - 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...

Linux Distros Unpatched Vulnerability : CVE-2026-54590

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - AsyncSSH is a Python package which provides an asynchronous client and server implementation of the SSHv2 protocol on top of the Python asyncio framework. Versi...

CVE-2026-54591

A flaw was found in AsyncSSH, a Python package for SSHv2 protocol implementation. A malicious SSH server could exploit this vulnerability by sending specially crafted filenames containing directory traversal sequences to an AsyncSSH SCP client. This could allow the server to write arbitrary files...

CVE-2026-54590

A flaw was found in AsyncSSH, a Python package for implementing the SSHv2 protocol. An incomplete fix for a previous vulnerability allowed an attacker to bypass security restrictions in the AuthorizedKeysFile processing. By using specific characters like or environment variables $ENV in the...