CVEvulnerability

CVE-2026-27859

5.3 MEDIUM Published 2026-03-27 Modified 2026-10-26 Official page ↗
Status
Analyzed
Published
2026-03-27
Last modified
2026-10-26
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.3 MEDIUM — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Weaknesses
CWE-400

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.

Affected configurations

• dovecot dovecot (< 2.4.3) • open-xchange dovecot (< 3.0.5) • open-xchange dovecot (>= 3.1.0 < 3.1.4)

Related

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References