Bug 2543859 (CVE-2026-94002) - CVE-2026-94002 org.apache.sshd/sshd-sftp: Apache MINA SSHD: Denial of Service via unsolicited SFTP replies
Summary: CVE-2026-94002 org.apache.sshd/sshd-sftp: Apache MINA SSHD: Denial of Service...
Keywords:
Status: NEW
Alias: CVE-2026-94002
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-30 10:10 UTC by OSIDB Bzimport
Modified: 2026-10-15 23:26 UTC (History)
19 users (show)

Fixed In Version:
Clone Of:
Environment:
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System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:83670 0 None None None 2026-10-15 23:26:09 UTC

Description OSIDB Bzimport 2026-09-30 10:10:06 UTC 
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.
Comment 1 Jon Orris 2026-10-15 23:26:07 UTC 
This issue has been addressed in the following products:

  Red Hat Build of Apache Camel 4.18 for Quarkus 3.33

Via RHSA-2026:83670 https://access.redhat.com/errata/RHSA-2026:83670
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