CVE-2026-12080

CVE-2026-12080 affects the QEMU Guest Agent (qga). A local, unprivileged user can exploit the guest-ssh-add-authorized-keys handler by manipulating symbolic links through a deterministic directory-symlink bypass or a TOCTOU file-symlink race, enabling ownership of arbitrary root-owned files/direc...

EUVD-2026-45941

A flaw was found in the QEMU Guest Agent qga. A local unprivileged user can exploit a vulnerability in the guest-ssh-add-authorized-keys command handler by manipulating symbolic links. This can occur either through a deterministic directory-symlink bypass or a Time-of-Check to Time-of-Use TOCTOU...

CVE-2026-12080 Qemu-kvm: qemu-guest-agent: local privilege escalation via symlink attack in guest-ssh-add-authorized-keys

A flaw was found in the QEMU Guest Agent qga. A local unprivileged user can exploit a vulnerability in the guest-ssh-add-authorized-keys command handler by manipulating symbolic links. This can occur either through a deterministic directory-symlink bypass or a Time-of-Check to Time-of-Use TOCTOU...

CVE-2026-12080

A flaw was found in the QEMU Guest Agent qga. A local unprivileged user can exploit a vulnerability in the guest-ssh-add-authorized-keys command handler by manipulating symbolic links. This can occur either through a deterministic directory-symlink bypass or a Time-of-Check to Time-of-Use TOCTOU...

Linux Distros Unpatched Vulnerability : CVE-2026-12080

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - A flaw was found in the QEMU Guest Agent qga. A local unprivileged user can exploit a vulnerability in the guest-ssh-add-authorized-keys command handler by...

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...

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...

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...

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...

EulerOS 2.0 SP12 : openssh (EulerOS-SA-2026-2550)

According to the versions of the openssh packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : In OpenSSH before 10.3, a file downloaded by scp may be installed setuid or setgid, an outcome contrary to some users' expectations, if the...

Directory Traversal

Overview Affected versions of this package are vulnerable to Directory Traversal via improper handling of AuthorizedKeysFile path expansion in the authentication. An attacker can gain unauthorized access to files outside the intended authorized-keys directory by supplying a path containing a...

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...

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 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...

EulerOS 2.0 SP15 : openssh (EulerOS-SA-2026-2496)

According to the versions of the openssh packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.CVE-2026-35388 OpenSSH before 10.3 mishandles...

EulerOS 2.0 SP15 : openssh (EulerOS-SA-2026-2455)

According to the versions of the openssh packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities : OpenSSH before 10.3 omits connection multiplexing confirmation for proxy-mode multiplexing sessions.CVE-2026-35388 OpenSSH before 10.3 mishandles...

CVE-2026-45405

Dokku is a docker-powered PaaS. Prior to 0.38.2, the git:from-archive and certs:add commands extract user-supplied tar/zip archives into temporary directories without sanitizing member paths or preventing symlink traversal. GNU tar creates symlinks during extraction and follows them for subsequen...