https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-02T13:14:16.801817+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/fkie_cve-2026-53964 fkie_cve-2026-53964 2026-10-02T13:14:16.806667+00:00

Document Merge Service is a document template merge service providing an API to manage templates and merge them with given data. Prior to version 9.1.0, a remote code execution (RCE) via server-side template injection (SSTI) allows for user supplied code to be executed in the server's context where it is executed as the document-merge-server user with the UID 901 thus giving an attacker considerable control over the container. The vulnerability is limited to XLSX templates, were the xltpl library uses a npn-sandboxed Jinja environment for the processing of the template. This issue has been patched in version 9.1.0.

 https://vulnerability.circl.lu/vuln/ghsa-w47q-945m-q9pc GHSA-w47q-945m-q9pc — Document Merge Service vulnerable to RCE via SSTI (xlsx tempaltes) 2026-10-02T13:14:16.806780+00:00

Affected: PyPI: document-merge-service

### Impact A remote code execution (RCE) via server-side template injection (SSTI) allows for user supplied code to be executed in the server's context where it is executed as the document-merge-server user with the UID 901 thus giving an attacker considerable control over the container. The vulnerability is limited to XLSX templates, were the `xltpl` library uses a npn-sandboxed Jinja environment for the processing of the template.

### Patches It has been patched in [v9.1.0](https://github.com/adfinis/document-merge-service/releases/tag/v9.1.0)

### Workarounds Disable the upload/usage of XLSX templates.

### References Are there any links users can visit to find out more?

https://book.hacktricks.xyz/pentesting-web/ssti-server-side-template-injection/jinja2-ssti

 https://vulnerability.circl.lu/vuln/pysec-2026-3830 PYSEC-2026-3830 — Document Merge Service vulnerable to RCE via SSTI (xlsx tempaltes) 2026-10-02T13:14:16.806868+00:00

Affected: PyPI: document-merge-service

### Impact A remote code execution (RCE) via server-side template injection (SSTI) allows for user supplied code to be executed in the server's context where it is executed as the document-merge-server user with the UID 901 thus giving an attacker considerable control over the container. The vulnerability is limited to XLSX templates, were the `xltpl` library uses a npn-sandboxed Jinja environment for the processing of the template.

### Patches It has been patched in [v9.1.0](https://github.com/adfinis/document-merge-service/releases/tag/v9.1.0)

### Workarounds Disable the upload/usage of XLSX templates.

### References Are there any links users can visit to find out more?

https://book.hacktricks.xyz/pentesting-web/ssti-server-side-template-injection/jinja2-ssti