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CVE-2026-27859

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CVE-2026-27859

Published: Mar 27, 2026

Modified: Mar 27, 2026

PUBLISHED

CVSS v3.1

5.3

MEDIUM

Description

A mail message containing excessive amount of RFC 2231 MIME parameters causes LMTP to use too much CPU. A suitably formatted mail message causes mail delivery process to consume large amounts of CPU time. Use MTA capabilities to limit RFC 2231 MIME parameters in mail messages, or upgrade to fixed version where the processing is limited. No publicly available exploits are known.

VendorProductVersions

Open-Xchange GmbH

OX Dovecot Pro

affected
0 - <= 3.0.2
affected
0 - <= 3.1.0
affected
0 - <= 2.4.0

Weaknesses (CWE)

CWE-400

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

References

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