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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
SEPPmail AG SEPPmail Secure Email Gateway (SEG) unknown
Version Status Constraints
0 affected < 15.1.1

No data.

No data.

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://docs.seppmail.com/en/20_revision-history.html cve-icon cve-icon
History

Wed, 04 Nov 2026 08:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Pre-authentication upload parsing permits resource exhaustion
Weaknesses CWE-400
References
Metrics cvssV4_0

{'score': 8.7, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: NCSC.ch

Published:

Updated: 2026-11-04T08:33:13.228Z

Reserved: 2026-10-21T13:14:01.740Z

Link: CVE-2026-114426

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-11-04T09:17:41.970

Modified: 2026-11-04T09:17:41.970

Link: CVE-2026-114426

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-11-04T10:00:14Z

Weaknesses