SFTP Path Traversal Vulnerability in JumpServer by Jumpserver
CVE-2026-54336

5.4MEDIUM

Key Information:

Vendor

Jumpserver

Status
Jumpserver
Vendor
CVE Published:
17 August 2026

What is CVE-2026-54336?

The JumpServer platform, which serves as an open-source bastion host and security audit system, has a vulnerability that allows authenticated users with SFTP permissions to exploit traversal paths. This flaw affects versions from 4.8.0 to 4.10.16, enabling malicious users to resolve paths outside the designated SFTP root through the KoKo Web Terminal's SFTP feature. This can lead to unauthorized read, write, rename, or delete operations on assets under the configured backend account, posing serious security risks. The issue has been addressed and patched in version 4.10.17.

Affected Version(s)

jumpserver >= 4.8.0, < 4.10.17

References

https://github.com/jumpserver/jumpserver/security/advisor...
x_refsource_CONFIRM
https://github.com/jumpserver/koko/commit/02fabebe27dacce...
x_refsource_MISC
https://github.com/jumpserver/koko/releases/tag/v4.10.17
x_refsource_MISC

CVSS V3.1

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.