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CVE-2026-77185: Apache MINA SSHD

Severity

9.1 (CRITICAL)

Vendor

APACHE

Affected versions

2.0.0 through before 2.20.0; 3.0.0-M1 through before 3.0.0-M6

Patch status

Unknown

Published

2026-09-30T10:17:17.123

Modified

2026-09-30T17:16:49.877

Why it matters

This matters because the affected product may be exploitable without valid credentials. Internet-facing deployments should be reviewed first.

Recommended admin actions

• Prioritize validation immediately due to critical CVSS severity.

Technical 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.

View the official NVD record for CVE-2026-77185

CVE data is sourced from NVD/CNA records and optional enrichment. Validate against the vendor advisory before taking production action.