Server-Side Memory Exhaustion in Apache MINA SSHD by The Apache Software Foundation
CVE-2026-94029

6.5MEDIUM

Key Information:

Vendor

Apache
Status
Apache Mina Sshd
Vendor
CVE Published:
30 September 2026

What is CVE-2026-94029?

The server-side memory exhaustion vulnerability in Apache MINA SSHD affects versions 1.0.0 to 2.19.0 and 3.0.0-M1 to 3.0.0-M5 in the sshd-sftp component. This issue arises when using a very small block size during file transfer, resulting in excessive server-side memory usage due to the accumulation of SFTP reply messages. Consequently, a large file can exhaust server memory resources, potentially leading to server downtime. It is advised to upgrade to version 2.20.0 or 3.0.0-M6, which address the vulnerability by enforcing limits on reply size.

Affected Version(s)

Apache MINA SSHD 1.0.0 < 2.20.0

Apache MINA SSHD 3.0.0-M1 < 3.0.0-M6

References

https://lists.apache.org/thread.html/ytbl4rwby62xl7llm3wp...
vendor-advisory

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ho1aAs <xxy010605@gmail.com>
.