What is CVE-2026-54590?

CVE-2026-54590 is a medium-severity vulnerability in Ronf Asyncssh, classified under Path Traversal. CVSS score: 5.9/10. Published 2026-07-08.

How severe is CVE-2026-54590?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Auth bypass in Ronf Asyncssh

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._set…

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Ronf Asyncssh — versions < 2.23.1

Weakness classification (CWE)

CWE-22 — Path Traversal
CWE-639 — Authorization Bypass Through User-Controlled Key

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-54590?: CVE-2026-54590 is a medium-severity vulnerability in Ronf Asyncssh, classified under Path Traversal. CVSS score: 5.9/10. Published 2026-07-08.
How severe is CVE-2026-54590?: Medium severity. CVSS v3 base score is 5.9 out of 10.