CVE-2026-19761Public exploitNetwork attack vector

Authenticated arbitrary file write via upload filename

Published Aug 13, 2026 · Updated Aug 14, 2026

Path traversal in DTStack Taier 1.4.0 allows remote authenticated users to overwrite JVM-writable files via multipart filenames. UploadController.getResourcesFromFiles appends getOriginalFilename() directly to file-uploads and passes the resulting path to transferTo without sanitization or a canonical containment check. A valid operator session with component-management access is required, and filesystem impact is limited to locations writable by the Taier JVM user.

CVSS severity5.1
Medium
EPSS probability0.40%
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 DTStack Taier 1.4.0 allows remote authenticated users to overwrite JVM-writable files via multipart filenames. UploadController.getResourcesFromFiles appends getOriginalFilename() directly to file-uploads and passes the resulting path to transferTo without sanitization or a canonical containment check. A valid operator session with component-management access is required, and filesystem impact is limited to locations writable by the Taier JVM user.

The record

CVE
CVE-2026-19761
Published
Aug 13, 2026
Updated
Aug 14, 2026
Vendor
DTStack
Product
Taier
Classifications
CWE-22, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 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=1.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

DTStack · Taierversion=1.4.0

Published CVSS scores

5.1VulDBCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
4.7VulDBCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L
5.8VulDBAV:N/AC:L/Au:M/C:P/I:P/A:P

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.

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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')
T1190Exploit Public-Facing Application

Public exploit references

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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