DEBIAN-CVE-2026-54591

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Source
https://security-tracker.debian.org/tracker/CVE-2026-54591
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54591.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-54591
Upstream
Published
2026-07-08T21:16:49.657Z
Modified
2026-07-10T14:00:10.987765607Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H CVSS Calculator
Summary
[none]
Details

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 parsecd_args in scp.py returns server-provided names verbatim and recvfiles joins them to the destination path without enforcing the target directory boundary. This issue is fixed in version 2.23.1.

References

Affected packages

Debian:11 / python-asyncssh

Package

Name
python-asyncssh
Purl
pkg:deb/debian/python-asyncssh?arch=source&distro=bullseye

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.5.0-0.1
2.5.0-0.1+deb11u1
2.5.0-1
2.10.1-1
2.10.1-2
2.15.0-1
2.16.0-1
2.17.0-1
2.17.0-2
2.18.0-1
2.19.0-1
2.20.0-1
2.21.0-1
2.21.1-1
2.22.0-1
2.22.0-2
2.23.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54591.json"

Debian:12 / python-asyncssh

Package

Name
python-asyncssh
Purl
pkg:deb/debian/python-asyncssh?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.10.1-2
2.10.1-2+deb12u1
2.10.1-2+deb12u2
2.15.0-1
2.16.0-1
2.17.0-1
2.17.0-2
2.18.0-1
2.19.0-1
2.20.0-1
2.21.0-1
2.21.1-1
2.22.0-1
2.22.0-2
2.23.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54591.json"

Debian:13 / python-asyncssh

Package

Name
python-asyncssh
Purl
pkg:deb/debian/python-asyncssh?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.20.0-1
2.21.0-1
2.21.1-1
2.22.0-1
2.22.0-2
2.23.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54591.json"

Debian:14 / python-asyncssh

Package

Name
python-asyncssh
Purl
pkg:deb/debian/python-asyncssh?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.20.0-1
2.21.0-1
2.21.1-1
2.22.0-1
2.22.0-2
2.23.0-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-54591.json"