Apache MINA SSHD up to 2.18.0/3.0.0-M4 sshd-scp path traversal

Summaryinfo

A vulnerability was found in Apache MINA SSHD up to 2.18.0/3.0.0-M4. It has been rated as critical. Affected by this vulnerability is an unknown functionality of the component sshd-scp. The manipulation leads to path traversal. This vulnerability is referenced as CVE-2026-56452. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Apache MINA SSHD up to 2.18.0/3.0.0-M4. This issue affects an unknown function of the component sshd-scp. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Path traversal in the sshd-scp component of Apache MINA SSHD. Apache MINA SSHD is a Java library for client-side and server-side SSH. The implementation of receiving files or directories via SCP did not validate filenames in SCP "C" or "D" commands. A malicious sender could send filenames containing paths, resulting in files to be written in attacker-controlled places. The issue affects only * applications that use no longer supported Apache MINA SSHD versions < 2.0.0 and use the SCP functions to receive files, * or applications using sshd-scp in Apache MINA SSHD >= 2.0.0 to receive files. Applications using Apache MINA SSHD >= 2.0.0 not using sshd-scp are not affected. The issue is fixed in Apache MINA 2.19.0 and 3.0.0-M5. Affected applications are advised to upgrade to these versions.

The advisory is shared at lists.apache.org. The identification of this vulnerability is CVE-2026-56452 since 06/22/2026. The exploitation is known to be easy. The attack may be initiated remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/20/2026). MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 2.19.0 or 3.0.0-M5 eliminates this vulnerability.

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Productinfo

Type

• SSH Server Software

Vendor

• Apache

Name

• MINA SSHD

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.12
• 2.13
• 2.14
• 2.15
• 2.16
• 2.17
• 2.18.0
• 3.0.0-M4

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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