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Vulnerabilities CVE-2026-27858

CVE-2026-27858

High
Open
TLP:CLEAR

AI Analysis

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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.

Details

CVSS Score
7.5
EPSS Score
0.79%

53th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Confidence
90%
Published
Mar 27, 2026
Last Modified
Jul 15, 2026
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