Vulnerability · Published Sep 30, 2026 · Assigned by apache
CVE-2026-94002Apache MINA SSHD: Memory exhaustion in SFTP client via unsolicited SFTP replies
High 7.5
In plain English
A high-severity resource allocation without limits in Apache MINA SSHD from Apache Software Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | libmina-sshd-java | no fix listed | DEBIAN-CVE-2026-94002 |
| Debian:14 | libmina-sshd-java | no fix listed | DEBIAN-CVE-2026-94002 |
| Ubuntu:22.04:LTS | mina | no fix listed | UBUNTU-CVE-2026-94002 |
| Ubuntu:24.04:LTS | mina | no fix listed | UBUNTU-CVE-2026-94002 |
| Ubuntu:26.10 | mina2 | no fix listed | UBUNTU-CVE-2026-94002 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Apache Software Foundation | Apache MINA SSHD | 0.9.0 – before 2.20.03.0.0-M1 – before 3.0.0-M6 |
Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H