Apache MINA SSHD SFTP Client Memory Exhaustion (0.9.0-2.19.0, 3.0.0-M1-5)
CVE-2026-94002 Published on September 30, 2026
Apache MINA SSHD: Memory exhaustion in SFTP client via unsolicited SFTP replies
Possible memory exhaustion in SFTP clients (DefaultSftpClient) in component sshd-sftp in Apache MINA SSHD versions 0.9.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5.
Apache
MINA SSHD is a Java library for client-side and server-side SSH. The sshd-sftp component provides support for SFTP.
The SFTP client implementation, when receiving a reply, did not check that this reply corresponded to a request sent earlier. Unsolicited replies would be stored but never consumed. A malicious server could keep sending unsolicited replies until available memory in the client was exhausted.
Users are recommended to upgrade to version 2.20.0 or 3.0.0-M6, which fix this issue.
Vulnerability Analysis
CVE-2026-94002 is exploitable with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
Allocation of Resources Without Limits or Throttling
The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
Products Associated with CVE-2026-94002
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Affected Versions
Apache Software Foundation Apache MINA SSHD:- Version 0.9.0 and below 2.20.0 is affected.
- Version 3.0.0-M1 and below 3.0.0-M6 is affected.