---
id: "CVE-2026-114425"
kind: "vulnerability"
aliases: ["CVE-2026-114425"]
title: "SEPPmail gateway: unauthenticated mail can disclose, move or delete files"
severity: "critical"
cvss: 9.2
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["email-gateway", "infrastructure", "self-hosted", "seppmail"]
not_affected_if: ["lft-disabled", "version-15.1.1-or-later"]
published_at: "2026-11-04T09:17:41+00:00"
first_seen_at: "2026-11-04T09:26:09+00:00"
updated_at: "2026-11-04T09:26:47+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-114425", "first_seen_at": "2026-11-04T09:26:09+00:00"}]
---

# SEPPmail gateway: unauthenticated mail can disclose, move or delete files

SEPPmail Secure Email Gateway before 15.1.1 trusts a file path supplied in Large File Transfer attachment metadata. An unauthenticated remote sender can make the mail-processing worker disclose, move or delete an accessible regular file, and the validated workers ran as root.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed SEPPmail version against the fixed release in the product ranges.
- Check whether Large File Transfer (LFT) is enabled on the gateway; the flaw needs it enabled.

## Fix

- SEPPmail Secure Email Gateway: move to `15.1.1` or later.

## Timeline

- 2026-11-04T09:26:09+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-114425

## From the sources

SEPPmail Secure Email Gateway before 15.1.1 trusts a file path supplied in externally provided Large File Transfer attachment metadata. An unauthenticated remote sender can cause the mail-processing worker to disclose, move, or delete an accessible regular file when LFT is enabled and the message reaches an affected secure-mail processing path. The validated workers ran as root.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_