JumpServer: KoKo Web Terminal SFTP Path Traversal on Authorized Asset

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-54336
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-17 21:16:45 UTC
Updated2026-08-18 14:17:11 UTC
DescriptionJumpServer 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.

Risk And Classification

Primary CVSS: v3.1 5.4 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

EPSS: 0.002660000 probability, percentile 0.186060000 (date 2026-08-18)

Problem Types: CWE-22 | CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
3.1CNADECLARED5.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Jumpserver Jumpserver affected >= 4.8.0, < 4.10.17 Not specified

References

ReferenceSourceLinkTags
github.com/jumpserver/koko/commit/02fabebe27dacce89114fba122c667a946fd12ea [email protected] github.com
github.com/jumpserver/koko/releases/tag/v4.10.17 [email protected] github.com
github.com/jumpserver/jumpserver/security/advisories/GHSA-x6rg-36j6-76vr 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
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