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CVE-2026-54591

HIGH
8.1
CVSS 3.1
Description
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 SCP client's filesystem by sending filenames containing ../ traversal sequences because _parse_cd_args in scp.py returns server-provided names verbatim and _recv_files joins them to the destination path without enforcing the target directory boundary. This issue is fixed in version 2.23.1.

Metadata

CVE ID
CVE-2026-54591
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-15 19:45 UTC
Published
2026-07-08 20:33 UTC
Last updated
2026-07-08 20:33 UTC
Primary CWE
CWE-22
CWE-22: Improper Limitation of a Pathname to a Restricted Di…
Vendor / Product
ronf / asyncssh
Sources
cve.org  ·  NVD

Severity & Metrics

8.1 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Affected products (1)
VendorProductPlatformVersions
ronf asyncssh — < 2.23.1
Weakness (CWE)
CWESourceDescription
CWE-22 cna CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.1 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
References (3)
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