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CVE-2026-77473VulnerabilityPublished Updated

Python asyncssh: AsyncSSH is a Python package which provides an asynchronous client and server implementation of the

Affects python-asyncsshSource GCVE Database

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Authoritative record:CVE-2026-77473· Medium 6.5

Not known to be exploited · CVSS 6.5 Medium · fixed in 2.24.1 : update python-asyncssh when convenient.

Data as of 13 Nov 2026, 21:40 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (GitHub_M)CVSS 3.16.5
Patch
Available – fixed in 2.24.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 26.10python-asyncsshpkg:deb/ubuntu/python-asyncssh?arch=source&distro=stonkingOther threatsAffected
  • =2.21.1-1
  • =2.23.0-1
Fixed in–
Ubuntu 26.04 LTSpython-asyncsshpkg:deb/ubuntu/python-asyncssh?arch=source&distro=resoluteOther threatsAffected
  • =2.20.0-1
  • =2.21.1-1
Fixed in–
Ubuntu Pro 24.04 LTSpython-asyncsshpkg:deb/ubuntu/python-asyncssh?arch=source&distro=esm-apps/nobleOther threatsAffected
  • =2.10.1-2
  • =2.10.1-2ubuntu0.1
  • =2.10.1-2ubuntu0.1+esm1
Fixed in–
Ubuntu Pro 22.04 LTSpython-asyncsshpkg:deb/ubuntu/python-asyncssh?arch=source&distro=esm-apps/jammyOther threatsAffected
  • 2.5.0-1 – 2.5.0-1ubuntu0.1~esm1
4 affected builds
Fixed in–
Ubuntu 20.04 LTSpython-asyncsshpkg:deb/ubuntu/python-asyncssh?arch=source&distro=focalOther threatsAffected
  • =1.12.2-1
  • =1.12.2-1ubuntu0.1
  • =1.12.2-1ubuntu0.2
Fixed in–
Ubuntu Pro 18.04 LTSpython-asyncsshpkg:deb/ubuntu/python-asyncssh?arch=source&distro=esm-apps/bionicOther threatsAffected
  • 1.8.1-2 – 1.11.1-1ubuntu0.1~esm2
5 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade AsyncSSH to version 2.24.1 or later, where this vulnerability is fixed. No other mitigation is indicated or required.

Description

AsyncSSH versions prior to 2.24.1 contain a vulnerability in the SFTP client implementation where filenames returned by a remote server are trusted without validation. This allows a malicious or compromised SFTP server to specify absolute or path-traversal filenames, causing files to be written outside the intended local directory. The issue is fixed in version 2.24.1.

References

Community reviews

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