CVE-2026-77185
Authentication bypass in sshd-core in Apache MINA SSHD versions 2.0.0 to 2.19.0 and 3.0.0-M1 to…
- Risk score
- 68/100
- CVSS
- 9.1 v3.1
- Exploit chance (30 days)
- 0.5%
- Published
- 30 Sep 2026
Open in the live forecast Today's forecast
What to know
- What it is
- 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 authenticati…
- Affected
- See advisory
- Fix
- Apply the vendor's security update; see the linked advisory.
- Exploitation
- No known exploitation
In the news
TL;DR
Apache MINA SSHD has a critical authentication bypass vulnerability (CVE-2026-77185) in versions 2.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5.
- The vulnerability is remotely exploitable without logging in.
- The CVSS score is 9.1, indicating a critical risk.
- Atlassian's use of Apache SSHD presents a lower, non-critical assessed risk.
- Atlassian recommends updating to the latest product versions or fixed releases.
AI summary of 1 article.
Why it is Amber
- CVSS 9.1 critical
- Remotely exploitable without logging in
References
Original description
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.
Last activity 30 Sep 2026. Patch Forecast updates every hour.