What is CVE-2026-54591?

CVE-2026-54591 is a high-severity vulnerability in Ronf Asyncssh, classified under Path Traversal. CVSS score: 8.1/10. Published 2026-07-08.

How severe is CVE-2026-54591?

High severity. CVSS v3 base score is 8.1 out of 10.

Path Traversal in Ronf Asyncssh

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 SC…

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H.

Affected products

Ronf Asyncssh — versions < 2.23.1

Weakness classification (CWE)

CWE-22 — Path Traversal

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-2026-54591?: CVE-2026-54591 is a high-severity vulnerability in Ronf Asyncssh, classified under Path Traversal. CVSS score: 8.1/10. Published 2026-07-08.
How severe is CVE-2026-54591?: High severity. CVSS v3 base score is 8.1 out of 10.