Bug 2498488 - CVE-2026-54591 python-asyncssh: AsyncSSH: Arbitrary file write via path traversal in SCP client [fedora-all]
Summary: CVE-2026-54591 python-asyncssh: AsyncSSH: Arbitrary file write via path trave...
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Fedora
Classification: Fedora
Component: python-asyncssh
Version: rawhide
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Georg Sauthoff
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["4eed9dd9-fc37-41ac-9e83-4...
Depends On:
Blocks: CVE-2026-54591
TreeView+ depends on / blocked
 
Reported: 2026-07-09 12:39 UTC by Srikanth Balasubramanian
Modified: 2026-07-20 01:11 UTC (History)
2 users (show)

Fixed In Version: python-asyncssh-2.24.0-1.fc44 python-asyncssh-2.23.1-1.fc43
Clone Of:
Environment:
Last Closed: 2026-07-20 00:54:08 UTC
Type: ---
Embargoed:


Attachments (Terms of Use)

Description Srikanth Balasubramanian 2026-07-09 12:39:26 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.

Comment 1 Fedora Update System 2026-07-11 21:55:25 UTC
FEDORA-2026-1f248487e4 (python-asyncssh-2.24.0-1.fc44) has been submitted as an update to Fedora 44.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-1f248487e4

Comment 2 Fedora Update System 2026-07-11 23:26:07 UTC
FEDORA-2026-574496d9ae (python-asyncssh-2.23.1-1.fc43) has been submitted as an update to Fedora 43.
https://bodhi.fedoraproject.org/updates/FEDORA-2026-574496d9ae

Comment 3 Fedora Update System 2026-07-12 01:33:31 UTC
FEDORA-2026-1f248487e4 has been pushed to the Fedora 44 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-1f248487e4`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-1f248487e4

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 4 Fedora Update System 2026-07-12 01:51:29 UTC
FEDORA-2026-574496d9ae has been pushed to the Fedora 43 testing repository.
Soon you'll be able to install the update with the following command:
`sudo dnf upgrade --enablerepo=updates-testing --refresh --advisory=FEDORA-2026-574496d9ae`
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2026-574496d9ae

See also https://fedoraproject.org/wiki/QA:Updates_Testing for more information on how to test updates.

Comment 5 Fedora Update System 2026-07-20 00:54:08 UTC
FEDORA-2026-1f248487e4 (python-asyncssh-2.24.0-1.fc44) has been pushed to the Fedora 44 stable repository.
If problem still persists, please make note of it in this bug report.

Comment 6 Fedora Update System 2026-07-20 01:11:23 UTC
FEDORA-2026-574496d9ae (python-asyncssh-2.23.1-1.fc43) has been pushed to the Fedora 43 stable repository.
If problem still persists, please make note of it in this bug report.


Note You need to log in before you can comment on or make changes to this bug.