CVE-2026-18274Network attack vector

Authenticated root code execution via uploadJar traversal

Published Aug 20, 2026 · Updated Aug 20, 2026

Directory traversal in uploadJar in Heimdall Data Heimdall Database Proxy 25.03.01.21 allows remote authenticated users to execute code. The uploadJar handler accepts a user-supplied path for driver-file storage and performs file operations on it without restricting traversal outside the intended upload location. Exploitation requires valid application credentials to reach the driver-upload feature, and a successful path-controlled overwrite can run attacker code as root on the host.

CVSS severity7.2
High
EPSS probability1.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Directory traversal in uploadJar in Heimdall Data Heimdall Database Proxy 25.03.01.21 allows remote authenticated users to execute code. The uploadJar handler accepts a user-supplied path for driver-file storage and performs file operations on it without restricting traversal outside the intended upload location. Exploitation requires valid application credentials to reach the driver-upload feature, and a successful path-controlled overwrite can run attacker code as root on the host.

The record

CVE
CVE-2026-18274
Published
Aug 20, 2026
Updated
Aug 20, 2026
Vendor
Heimdall Data
Product
Heimdall Database Proxy
Classifications
CWE-22, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 20, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 20, 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=25.03.01.21

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Heimdall Data · Heimdall Database Proxyversion=25.03.01.21

Published CVSS scores

7.2ZDICVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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