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.
History

Thu, 01 Oct 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Important


Wed, 30 Sep 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 30 Sep 2026 13:15:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache mina Sshd
Vendors & Products Apache
Apache mina Sshd

Wed, 30 Sep 2026 11:30:00 +0000

Type Values Removed Values Added
References

Wed, 30 Sep 2026 10:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Apache MINA SSHD: Memory exhaustion in SFTP client via unsolicited SFTP replies
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published: 2026-09-30T09:37:01.922Z

Updated: 2026-09-30T14:31:45.869Z

Reserved: 2026-09-19T14:20:51.289Z

Link: CVE-2026-94002

cve-icon Vulnrichment

Updated: 2026-09-30T10:14:15.211Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-30T10:17:17.877

Modified: 2026-09-30T16:13:13.493

Link: CVE-2026-94002

cve-icon Redhat

Severity : Important

Publid Date: 2026-09-30T09:37:01Z

Links: CVE-2026-94002 - Bugzilla