JumpServer up to 4.10.16 KoKo Web Terminal SFTP feature sftp_asset.go AssetDir.GetRealPath privileges management

Summaryinfo

A vulnerability labeled as critical has been found in JumpServer up to 4.10.16. The impacted element is the function AssetDir.GetRealPath of the file pkg/srvconn/sftp_asset.go of the component KoKo Web Terminal SFTP feature. The manipulation results in privileges management. This vulnerability is cataloged as CVE-2026-54336. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in JumpServer up to 4.10.16. Affected is the function AssetDir.GetRealPath of the file pkg/srvconn/sftp_asset.go of the component KoKo Web Terminal SFTP feature. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

JumpServer is an open source bastion host and an operation and maintenance security audit system. From 4.8.0 until 4.10.17, an authenticated user with SFTP permission to an authorized asset can submit crafted traversal paths through the KoKo Web Terminal SFTP feature, causing AssetDir.GetRealPath() in pkg/srvconn/sftp_asset.go to resolve paths outside the intended SFTP root and permit read, list, write, rename, or delete operations under the configured backend account on that asset. This issue is fixed in version 4.10.17.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-54336 since 06/12/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 4.10.17 eliminates this vulnerability.

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Productinfo

Name

• JumpServer

Version

• 4.10.0
• 4.10.1
• 4.10.2
• 4.10.3
• 4.10.4
• 4.10.5
• 4.10.6
• 4.10.7
• 4.10.8
• 4.10.9
• 4.10.10
• 4.10.11
• 4.10.12
• 4.10.13
• 4.10.14
• 4.10.15
• 4.10.16

Website

• Product: https://github.com/jumpserver/jumpserver/

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