Heimdall Data Database Proxy uploadJar Directory Traversal Remote Code Execution Vulnerability

July 29th, 2026
ZDI-26-479 ZDI-CAN-28603

CVE ID

CVE-2026-18274

CVSS Score

7.2 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Affected Vendors

Heimdall Data

Affected Products

Database Proxy

Vulnerability Details

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Heimdall Data Database Proxy. Authentication is required to exploit this vulnerability.

The specific flaw exists within the uploadJar method. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to execute code in the context of root.

Additional Details

Fixed in release build 25.03.01.24 (https://www.heimdalldata.com/release-notes)


Disclosure Timeline

  • 2026-04-14 - Vulnerability reported to vendor
  • 2026-07-29 - Coordinated public release of advisory
  • 2026-07-29 - Advisory Updated

Credit

Do Quoc Anh (@anhdq201) from mbbank.com.vn

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