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.

INFO

Published Date :

2026-03-27T08:10:22.058Z

Last Modified :

2026-03-27T12:35:14.776Z

Source :

OX
AFFECTED PRODUCTS

The following products are affected by CVE-2026-27859 vulnerability.

Vendors Products
Dovecot
  • Dovecot
Open-xchange
  • Dovecot
  • Ox Dovecot Pro
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-27859.

URL Resource
https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-27859 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-27859 cve-icon
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CVSS Vulnerability Scoring System

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