# CVE-2026-114426: Pre-authentication upload parsing permits resource exhaustion

Status: published. Published: 2026-11-04. Updated: 2026-11-04.

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.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- SEPPmail AG / SEPPmail Secure Email Gateway (SEG): ≥ 0; < 15.1.1 (affected, custom). Source: CNA: NCSC.ch

## Severity and prioritization

- CVSS 4.0: 8.7 (high); 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; source: CNA: NCSC.ch

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-400

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://docs.seppmail.com/en/20_revision-history.html (CNA: NCSC.ch)

## Provenance

- CNA: NCSC.ch: https://www.cve.org/CVERecord?id=CVE-2026-114426; retrieved 2026-11-04; source updated 2026-11-04

Revision: bb6a5656fd48b26af28a10456a9f9d6090ea1b4d2560fa353dc6f043be35b75e

Canonical: https://y2.dev/cve/CVE-2026-114426

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