Bug 2498422 - CVE-2026-54590 python-asyncssh: AsyncSSH: Unauthorized file modification via authorized-keys directory escape [epel-all]
Summary: CVE-2026-54590 python-asyncssh: AsyncSSH: Unauthorized file modification via ...
Keywords:
Status: ON_QA
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: python-asyncssh
Version: epel10
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Georg Sauthoff
QA Contact:
URL:
Whiteboard: {"flaws": ["04beefdf-9565-45a1-a165-e...
Depends On:
Blocks: CVE-2026-54590
TreeView+ depends on / blocked
 
Reported: 2026-07-09 07:11 UTC by Ganesh
Modified: 2026-07-13 00:20 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


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Description Ganesh 2026-07-09 07:11:07 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. Version 2.23.0 contains an incomplete fix for CVE-2026-45309 in SSHServerConfig._set_tokens that blocks /, , and .. before %u substitution in AuthorizedKeysFile but does not block a leading ~ or ${ENV}, allowing later expansion in _expand_val and Path(filename).expanduser() to escape the intended authorized-keys directory. This issue is fixed in version 2.23.1.

Comment 1 Fedora Update System 2026-07-12 22:47:34 UTC
FEDORA-EPEL-2026-f1bf34001a (python-asyncssh-2.24.0-2.el10_3) has been submitted as an update to Fedora EPEL 10.3.
https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-f1bf34001a

Comment 2 Fedora Update System 2026-07-13 00:20:02 UTC
FEDORA-EPEL-2026-f1bf34001a has been pushed to the Fedora EPEL 10.3 testing repository.

You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-EPEL-2026-f1bf34001a

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


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