CVE-2026-57898Network attack vector

Unauthenticated file write via thumbnail path traversal

Published Jul 14, 2026 · Updated Jul 14, 2026

Path traversal in Eclipse BaSyx Java Server SDK 2.0.0-milestone-05 through 2.0.0-milestone-12 allows remote attackers to write files. The thumbnail upload path reuses the client-controlled fileName as a GridFS key and then as an unnormalized local path during retrieval. Only MongoDB-backed deployments are exposed; retrieval writes the uploaded bytes wherever the Java process has permission, enabling code execution.

CVSS severity9.0
Critical
EPSS probability0.68%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Eclipse BaSyx Java Server SDK 2.0.0-milestone-05 through 2.0.0-milestone-12 allows remote attackers to write files. The thumbnail upload path reuses the client-controlled fileName as a GridFS key and then as an unnormalized local path during retrieval. Only MongoDB-backed deployments are exposed; retrieval writes the uploaded bytes wherever the Java process has permission, enabling code execution.

The record

CVE
CVE-2026-57898
Published
Jul 14, 2026
Updated
Jul 14, 2026
Vendor
The Eclipse Foundation
Product
Eclipse BaSyx Java Server SDK
Classifications
CWE-73, CWE-22, T1105, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=2.0.0-milestone-05 <2.0.0-milestone-13

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Eclipse Foundation · Eclipse BaSyx Java Server SDKversion=2.0.0-milestone-05 <2.0.0-milestone-13

Published CVSS scores

9.0Eclipse FoundationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-73External Control of File Name or Path
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1105Ingress Tool Transfer
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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