CVE-2026-33603
MEDIUM
6,8
Source: [email protected]
Attack Vector: adjacent_network
Attack Complexity: high
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: none
Description
AI Translation Available
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.
99
Improper Control of Resource Identifiers ('Resource Injection')
DraftCommon Consequences
Security Scopes Affected:
Confidentiality
Integrity
Potential Impacts:
Read Application Data
Modify Application Data
Read Files Or Directories
Modify Files Or Directories
Applicable Platforms
All platforms may be affected
https://documentation.open-xchange.com/dovecot/security/advisories/csaf/2026/ox…