CVE catalog

CVE-2026-54591

Severity: High · CVSS 8.1CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Published: Jul 8, 2026, 8:33:57 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.49% · Oct 25, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	python-asyncssh	sid	`2.24.0-2`	fixed
Debian	python-asyncssh	forky	`2.24.0-2`	fixed
Debian	python-asyncssh	trixie	`2.20.0-1`	vulnerable
Debian	python-asyncssh	bookworm	`2.10.1-2+deb12u2`	vulnerable
Debian	python-asyncssh	bookworm-security	`2.10.1-2+deb12u1`	vulnerable
Cpe	python-asyncssh	Not reported	Not reported	vulnerable
Pip	asyncssh	Not reported	`2.23.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	python-asyncssh	source	sid	`2.24.0-1`	not yet assigned	Not reported	[1141818]
Debian	python-asyncssh	source	forky	`2.24.0-1`	not yet assigned	Not reported	[1141818]
Debian	python-asyncssh	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1141818]
Debian	python-asyncssh	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1141818]
Pip	asyncssh	pip	Not reported	`2.23.1`	Not reported	GHSA-2WXC-X7RJ-HG8F	Not reported

[Debian bug #1141818]

Notes

[trixie] python-asyncssh: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[python3-asyncssh]Affected
Source package: [python-asyncssh]
Details (4)
- 2.10.1-2+deb12u2 · all · bookworm
  Affected
  nvd · python-asyncssh · debian · bookworm; nvd · python-asyncssh · debian · 12
- 2.10.1-2+deb12u2 · all · bookworm
  Affected
  nvd · python-asyncssh · debian · bookworm; nvd · python-asyncssh · debian · 12
- 2.10.1-2+deb12u1 · all · bookworm-security
  Affected
  nvd · python-asyncssh · debian · bookworm; nvd · python-asyncssh · debian · 12
- 2.10.1-2+deb12u1 · all · bookworm-security
  Affected
  nvd · python-asyncssh · debian · bookworm; nvd · python-asyncssh · debian · 12
[python-asyncssh-doc]Affected
Source package: [python-asyncssh]
Details (4)
- 2.10.1-2+deb12u2 · all · bookworm
  Affected
  nvd · python-asyncssh · debian · bookworm; nvd · python-asyncssh · debian · 12
- 2.10.1-2+deb12u2 · all · bookworm
  Affected
  nvd · python-asyncssh · debian · bookworm; nvd · python-asyncssh · debian · 12
- 2.10.1-2+deb12u1 · all · bookworm-security
  Affected
  nvd · python-asyncssh · debian · bookworm; nvd · python-asyncssh · debian · 12
- 2.10.1-2+deb12u1 · all · bookworm-security
  Affected
  nvd · python-asyncssh · debian · bookworm; nvd · python-asyncssh · debian · 12

[Debian 13 (Trixie)]

[python3-asyncssh]Affected
Source package: [python-asyncssh]
Details (2)
- 2.20.0-1 · all · trixie
  Affected
  nvd · python-asyncssh · debian · 13
- 2.20.0-1 · all · trixie
  Affected
  nvd · python-asyncssh · debian · 13
[python-asyncssh-doc]Affected
Source package: [python-asyncssh]
Details (2)
- 2.20.0-1 · all · trixie
  Affected
  nvd · python-asyncssh · debian · 13
- 2.20.0-1 · all · trixie
  Affected
  nvd · python-asyncssh · debian · 13

Observed: Oct 23, 2026, 9:44:26 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]