CVE-2026-33603
Published: May 12, 2026
Modified: May 12, 2026
CVSS v3.1
6.8
Description
Attacker can use a specially crafted base64 exchange between Dovecot and Client to fake SCRAM TLS channel binding. This requires that the attacker is able to position itself between Dovecot and the client connection. If successful, the attacker can eavesdrop communications between Dovecot and client as MITM proxy. Install fixed version. No publicly available exploits are known.
| Vendor | Product | Versions |
|---|---|---|
Open-Xchange GmbH | OX Dovecot Pro | affected 0 - <= 3.1.0affected 0 - <= 2.4.0 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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