Heimdall Data Database Proxy generateFileContent CRLF Injection Remote Code Execution Vulnerability

July 23rd, 2026
ZDI-26-447 ZDI-CAN-29251

CVE ID

CVE-2026-12357

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 generateFileContent function. The issue results from the lack of proper neutralization of CRLF sequences. 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

  • 2026-02-12 - Vulnerability reported to vendor
  • 2026-07-23 - Coordinated public release of advisory
  • 2026-07-23 - Advisory Updated

Credit

Bobby Gould (@bobbygould5) of TrendAI Zero Day Initiative

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