CVE-2026-53964

HIGHCVSS 7.2

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.

Published 2026-10-01 · last modified 2026-10-01

Full record at NVD ↗

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Ncerio by BeyondNets · data from NVD, CISA KEV, EPSS.