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.
References
| Link | Resource |
|---|---|
| https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json | Vendor Advisory |
Configurations
Configuration 1 (hide)
|
History
30 Apr 2026, 17:39
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:* cpe:2.3:a:open-xchange:dovecot:*:*:*:*:pro:*:*:* |
|
| First Time |
Open-xchange
Open-xchange dovecot Dovecot Dovecot dovecot |
|
| References | () https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.json - Vendor Advisory |
27 Mar 2026, 09:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-03-27 09:16
Updated : 2026-04-30 17:39
NVD link : CVE-2026-27859
Mitre link : CVE-2026-27859
CVE.ORG link : CVE-2026-27859
JSON object : View
Products Affected
open-xchange
- dovecot
dovecot
- dovecot
CWE
CWE-400
Uncontrolled Resource Consumption