# asyncssh (PyPI) vulnerabilities

7 known vulnerabilities (2 high, 4 medium), with the versions each affects and the releases that fix them.

## At a glance

- Latest release: 2.24.1 (Oct 4, 2026): no advisory affects it
- Newest unaffected release: 2.24.1 (Oct 4, 2026), the latest release
- Weekly downloads: 3.6M
- Dependents: 656
- Releases: 93 since 0.8.1 (Aug 16, 2014)
- Registry: https://pypi.org/project/asyncssh/
- Releases read: Nov 8, 2026

## Version timeline

Affected versions per advisory, in version order:

- CVE-2026-62949: 0.8.1 to 2.23.1 (2.24.0 is outside it)
- CVE-2026-45309: 2.22.0 (2.23.0 is outside it)
- CVE-2026-54590: 0.8.1 to 2.23.0 (2.23.1 is outside it)
- CVE-2026-54591: 0.8.1 to 2.23.0 (2.23.1 is outside it)
- CVE-2023-46446: 0.8.1 to 2.14.0 (2.14.1 is outside it)
- CVE-2023-46445: 0.8.1 to 2.14.0 (2.14.1 is outside it)
- CVE-2018-7749: 0.8.1 to 1.12.0 (1.12.1 is outside it)

## Advisories (7)

### [CVE-2026-62949](https://cve.now/CVE-2026-62949): AsyncSSH: asyncio event-loop freeze via SSH maximum packet size = 0 in SSH\_MSG\_CHANNEL\_OPEN / OPEN\_CONFIRMATION

- Severity: Medium 6.5
- Published: Sep 16, 2026
- Affected: fixed in 2.24.0.
- Fixed in 2.24.0 (released Jun 27, 2026, 81 days before disclosure).
- The latest release, 2.24.1, is not affected.

### [CVE-2026-45309](https://cve.now/CVE-2026-45309): AsyncSSH \`AuthorizedKeysFile %u\` path traversal allows attacker-selected authorized keys to authenticate a traversal username

- Severity: High 8.2
- Published: Jul 17, 2026
- Affected: from 2.22.0, fixed in 2.23.0.
- Fixed in 2.23.0 (released May 9, 2026, 69 days before disclosure).
- The latest release, 2.24.1, is not affected.

### [CVE-2026-54590](https://cve.now/CVE-2026-54590): AsyncSSH AuthorizedKeysFile username substitution bypass through ~ and environment expansion

- Severity: Medium 5.9
- Published: Jul 8, 2026
- Affected: fixed in 2.23.1.
- Fixed in 2.23.1 (released Jun 7, 2026, 31 days before disclosure).
- The latest release, 2.24.1, is not affected.

### [CVE-2026-54591](https://cve.now/CVE-2026-54591): AsyncSSH: SCP Path Traversal to Arbitrary File Write

- Severity: High 8.1
- Published: Jul 8, 2026
- Affected: fixed in 2.23.1.
- Fixed in 2.23.1 (released Jun 7, 2026, 31 days before disclosure).
- The latest release, 2.24.1, is not affected.

### [CVE-2023-46446](https://cve.now/CVE-2023-46446): An issue in AsyncSSH before 2.14.1 allows attackers to control the remote end of an SSH client session via packet injection/removal and…

- Severity: Medium 6.8
- Published: Nov 14, 2023
- Affected: fixed in 2.14.1.
- Fixed in 2.14.1 (released Nov 9, 2023, 5 days before disclosure).
- The latest release, 2.24.1, is not affected.

### [CVE-2023-46445](https://cve.now/CVE-2023-46445): An issue in AsyncSSH before 2.14.1 allows attackers to control the extension info message (RFC 8308) via a man-in-the-middle attack, aka a…

- Severity: Medium 5.9
- Published: Nov 14, 2023
- Affected: fixed in 2.14.1.
- Fixed in 2.14.1 (released Nov 9, 2023, 5 days before disclosure).
- The latest release, 2.24.1, is not affected.

### [CVE-2018-7749](https://cve.now/CVE-2018-7749): The SSH server implementation of AsyncSSH before 1.12.1 does not properly check whether authentication is completed before processing…

- Severity: Unrated
- Published: Mar 12, 2018
- Affected: fixed in 1.12.1; fixed in 1.12.1.
- Fixed in 1.12.1 (released Mar 10, 2018, 2 days before disclosure).
- The latest release, 2.24.1, is not affected.

---

Source: cve.now
Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards.
Page: https://cve.now/packages/pypi/asyncssh
Site guide for agents: https://cve.now/llms.txt
Uses NVD data; not endorsed by NVD.