CVE-2025-59032

dovecot: ManageSieve: Denial of Service via crafted SASL initial response in AUTHENTICATE command

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Severity

Important

Red Hat Product Security

7.5

CVSS 3.1

Review impact separately from score.

Published · March 27, 2026

Updated · June 30, 2026

Description

A flaw was found in ManageSieve. A remote attacker can exploit this vulnerability by sending a crafted SASL (Simple Authentication and Security Layer) initial response during the AUTHENTICATE command. This can cause the ManageSieve service to crash repeatedly, leading to a Denial of Service (DoS) for other users.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-229 · Improper Handling of Values