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7.5высокая

CVE-2026-27858

Описание

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.

Затрагиваемое ПО
Dovecot DovecotOpen-xchange Dovecot
CVSS
Балл7.5 — высокая
ВекторCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Источники
https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/oxdc-adv-2026-0001.jsonhttps://access.redhat.com/errata/RHSA-2026:13498https://access.redhat.com/errata/RHSA-2026:13830https://access.redhat.com/errata/RHSA-2026:13857https://access.redhat.com/errata/RHSA-2026:17602https://access.redhat.com/errata/RHSA-2026:17625https://access.redhat.com/errata/RHSA-2026:17626https://access.redhat.com/errata/RHSA-2026:17628