CVE-2026-54336Public exploitNetwork attack vector

Authenticated file access via SFTP path traversal

Published Aug 17, 2026 · Updated Aug 18, 2026

Path traversal in JumpServer KoKo 4.8.0 through 4.10.16 allows remote authenticated users to access files beyond an asset's SFTP root. AssetDir.GetRealPath() joins crafted paths without first normalizing them and confirming that the result remains beneath the configured root. Exploitation requires SFTP permission to the asset and permits read, list, write, rename, or delete operations only as its configured backend account.

CVSS severity5.4
Medium
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Path traversal in JumpServer KoKo 4.8.0 through 4.10.16 allows remote authenticated users to access files beyond an asset's SFTP root. AssetDir.GetRealPath() joins crafted paths without first normalizing them and confirming that the result remains beneath the configured root. Exploitation requires SFTP permission to the asset and permits read, list, write, rename, or delete operations only as its configured backend account.

The record

CVE
CVE-2026-54336
Published
Aug 17, 2026
Updated
Aug 18, 2026
Vendor
JumpServer
Product
JumpServer
Classifications
CWE-22, T1565.001, T1005
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 4.8.0, < 4.10.17

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

JumpServer · JumpServerversion=>= 4.8.0, < 4.10.17

Published CVSS scores

5.4GitHub CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1565.001Stored Data Manipulation
T1005Data from Local System

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo