CVE-2026-54336 JumpServer: KoKo Web Terminal SFTP Path Traversal on Authorized Asset
Authenticated users with SFTP permissions can traverse directories to read, modify, or delete files on authorized assets via the KoKo Web Terminal.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-54336?
CVE-2026-54336 is a medium-severity path traversal vulnerability in jumpserver, published on 17 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
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.
Weakness: CWE-22
Which versions are affected by CVE-2026-54336?
How do I fix CVE-2026-54336?
No fix has been published for CVE-2026-54336 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-54336 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-54336 exists.
Sources
Also known as GHSA-x6rg-36j6-76vr.