Auth bypass in Andreashappe Cochise
CVE-2026-90623
A weakness has been identified in andreashappe cochise up to 0.4.1. Affected is the function asyncssh.connect of the file src/cochise/ssh_connection.py of the component SSH Host Key Handler. Executing a manipulation can lead to improper certificate validation. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is told to be difficult. The exploit has been made available to the public and could be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (20.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 20.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Andreashappe Cochise — versions 0.4.0, 0.4.1
Weakness classification (CWE)
References
- vuldb.com/vuln/403205 (technical-description, vdb-entry)
- vuldb.com/vuln/403205/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-90623 (third-party-advisory)
- vuldb.com/submit/914815 (third-party-advisory)
- github.com/andreashappe/cochise/issues/13 (issue-tracking, exploit)
- github.com/andreashappe/cochise/ (product)
Frequently asked questions
- What is CVE-2026-90623?
- CVE-2026-90623 is a low-severity vulnerability in Andreashappe Cochise, classified under Improper Authentication. CVSS score: 3.7/10. Published 2026-09-14.
- How severe is CVE-2026-90623?
- Low severity. CVSS v3 base score is 3.7 out of 10.