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CVE-2026-27858

—
CVSS 3.1
7.5 high
EPSS
<1%p54
Published
()
Modified
Description

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.

Vendors
dovecotopen-xchange
Products
dovecot
Weakness
CWE-400, CWE-770
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD CVE.org GitHub PoCs EPSS (0.8%)

In the news

No ingested article mentions this CVE yet.