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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...
CVE-2026-27859
First seen on SecPulse
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Alpine Linux ALPINE-CVE-2026-27859 dovecot Fixed in: 2.4.3-r0
- Debian DEBIAN-CVE-2026-27859 dovecot Fixed in: 1:2.3.13+dfsg1-2+deb11u3
Original description The description as published by the source.
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
- advisory documentation.open-xchange.com
- advisory github.com
- advisory nvd.nist.gov