CVE-2026-33603
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.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 6.8
- CVSS vector
- CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS probability
- 0.21%
- CWE
- CWE-99
- Published
- 2026-05-12
- Last modified
- 2026-05-12
Affected products
- Open-Xchange GmbH OX Dovecot Pro
Weakness type
Related vulnerabilities
- CVE-2026-81524 — Cross-tenant database retargeting via dot/NUL injection in namespace strings in the C Driver
- CVE-2026-81521 — Cross-database write retargeting via unvalidated dotted database name in Client.BulkWrite in the MongoDB Go Driver
- CVE-2026-62910 — Microsoft Exchange Server Elevation of Privilege Vulnerability
- CVE-2026-15186 — macrozheng mall Portal Endpoint create resource injection
- CVE-2026-13493 — AIDC-AI ComfyUI-Copilot Workflow Checkpoint Restore conversation_api.py resource injection
- CVE-2026-12207 — medkey-org medkey HTTP REST API PatientController.php actionGetPatientById resource injection
- CVE-2026-10624 — SourceCodester Human Resource Management Employee View detailview.php resource injection
- CVE-2026-10299 — code-projects Online Hospital Management System viewdoctortimings.php resource injection