CVE-2026-77185 (GCVE-0-2026-77185)

Vulnerability from cvelistv5 – Published: 2026-09-30 09:47 – Updated: 2026-09-30 16:52
VLAI
Title
Apache MINA SSHD: Asynchronous authentication can bypass signature verification
Summary
Authentication bypass in sshd-core in Apache MINA SSHD versions 2.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 for a certain (presumed rare) way to implement an SSH server. Apache MINA SSHD is a Java library for client- and server-side SSH. In the server part of the library, a mechanism to perform "asynchronous authentication" exists. A server implemented with Apache MINA SSHD must contain explicit code to make use of this feature. The implementation of this feature was flawed and could potentially lead to skipping checking the signature in public-key or hostbased authentication, or returning a wrong result. Users are recommended to upgrade to Apache MINA SSHD 2.20.0 or 3.0.0-M6, which fix the logic error and which additionally forbid the use of this "asynchronous authentication" mechanism with the public-key or hostbased authentication schemes: if used, the SSH session will be closed and the server will log an entry indicating that asynchronous authentication may be used only with password or keyboard-interactive authentication.
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 16:51 UTC
CWE
  • CWE-305 - Authentication Bypass by Primary Weakness
Assigner
apache CNA under the mitre root
CNA scorecard B 76/100 over 1276 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Apache Software Foundation Apache MINA SSHD Affected: 2.0.0 , < 2.20.0 (maven)
Affected: 3.0.0-M1 , < 3.0.0-M6 (maven)
guessed Create a notification for this product.
Credits
Chris Jarret-Davies, OpenAI Security Research Team
Show details on NVD website
To clipboard 

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