Attacker can send a specifically crafted message before authentication that causes managesieve to allocate large amount of memory. Attacker can force managesieve-login to be unavailable by repeatedly crashing the process. Protect access to managesieve protocol, or install fixed version. No publicly available exploits are known.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade dovecot-pigeonholeUpgrade dovecot-pgsqlUpgrade dovecot-develUpgrade dovecot-mysqlUpgrade dovecot | May 6, 2026 | May 5, 2026 |
| Amazon_linux_2023 | — | Upgrade dovecot-debuginfoUpgrade dovecot-mysqlUpgrade dovecotUpgrade dovecot-pgsql-debuginfoUpgrade dovecot-pigeonholeUpgrade dovecot-pgsqlUpgrade dovecot-debugsourceUpgrade dovecot-pigeonhole-debuginfoUpgrade dovecot-mysql-debuginfoUpgrade dovecot-devel | Apr 14, 2026 | Mar 27, 2026 |
| Debian | — | Upgrade dovecot | Apr 7, 2026 | Apr 7, 2026 |
| Oracle_linux | — | Upgrade dovecot-pgsqlUpgrade dovecot-develUpgrade dovecotUpgrade dovecot-mysqlUpgrade dovecot-pigeonhole | May 6, 2026 | Mar 27, 2026 |
| Redhat_linux | — | Upgrade dovecotUpgrade dovecot-pigeonholeUpgrade dovecot-pgsql-debuginfoUpgrade dovecot-mysqlUpgrade dovecot-debugsourceUpgrade dovecot-mysql-debuginfoNo solution existsUpgrade dovecot-debuginfoUpgrade dovecot-develUpgrade dovecot-pigeonhole-debuginfoUpgrade dovecot-pgsql | May 6, 2026 | Mar 27, 2026 |
| Rocky_linux | — | Upgrade dovecot-pgsqlUpgrade dovecot-develUpgrade dovecot-pigeonholeUpgrade dovecot-pigeonhole-debuginfoUpgrade dovecot-pgsql-debuginfoUpgrade dovecot-mysql-debuginfoUpgrade dovecot-debugsourceUpgrade dovecot-mysqlUpgrade dovecotUpgrade dovecot-debuginfo | May 11, 2026 | May 7, 2026 |
| Ubuntu | — | Upgrade dovecot-core | Apr 1, 2026 | Mar 31, 2026 |
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