High 8.2Published Jul 17, 2026

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

Updated under an hour ago (Oct 26, 2026, 2:50 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for ronf asyncssh

Exploited in the last 30 days

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.

CVSS: 8.2 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-22
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 20, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

ronf asyncssh ronf:asyncssh (from the name)	before 2.23.0	CNA record
asyncssh_project asyncssh asyncssh_project:asyncssh	before 2.23.0	NVD

References

References

https://github.com/ronf/asyncssh/security/advisories/GHSA-g794-3fmp-753h	x-refsource-confirm, exploit, vendor-advisory
https://github.com/ronf/asyncssh/commit/2af2382cce946c959a378a62f257af253dc4ab51	x-refsource-misc, patch
https://github.com/ronf/asyncssh/commit/3d515ba9ba0cd9990d248bdf62bcf05d51261a88	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.