CVE-2026-94002

Apache MINA SSHD: Memory exhaustion in SFTP client via unsolicited SFTP replies

Published Sep 30, 2026 CVSS 3.1 · 7.5 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Sep 30, 2026, 2:31 PM
Reserved
Sep 19, 2026, 2:20 PM
Status
Awaiting Analysis
Published
Sep 30, 2026, 10:17 AM
Modified
Sep 30, 2026, 4:13 PM
Severity
Important
Public date
Sep 30, 2026, 9:37 AM