---
id: CVE-2026-114426
title: Pre-authentication upload parsing permits resource exhaustion
summary: >-
  SEPPmail Secure Email Gateway before 15.1.1 processes and writes v1
  file-interface upload data before authenticating the caller and without an
  absolute request-size limit. An unauthenticated remote attacker can occupy
  workers and consume…
severity: high
cvss: 8.7
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-400
vendor: SEPPmail AG
product: SEPPmail Secure Email Gateway (SEG)
affected:
  - seppmail_secure_email_gateway_seg < 15.1.1
published: '2026-11-04'
updated: '2026-11-04'
sourceUpdated: '2026-11-04T08:33:13.228Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-114426'
references:
  - url: 'https://docs.seppmail.com/en/20_revision-history.html'
tags:
  - cve.org
epss: 0.00322
epssPercentile: 0.25289
ingestedAt: '2026-11-05T20:33:06.720Z'
---

## Overview

SEPPmail Secure Email Gateway before 15.1.1 processes and writes v1 file-interface upload data before authenticating the caller and without an absolute request-size limit. An unauthenticated remote attacker can occupy workers and consume temporary storage with concurrent or slow requests, causing service unavailability.

## Affected

- `seppmail_secure_email_gateway_seg < 15.1.1`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.