PT-2026-40025
CVE-2026-33603
·
Published
2026-05-12
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Updated
2026-09-14
Description by
CVSS 3.1
6.8
MediumMetricsAV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Name of the Vulnerable Software and Affected Versions
Dovecot versions prior to 2.4.4-1.1
Description
An attacker positioned between Dovecot and the client connection can use a specially crafted base64 exchange to fake SCRAM TLS channel binding. This allows the attacker to act as a MITM (Man-in-the-Middle) proxy and eavesdrop on communications between the client and the server.
Recommendations
Update to version 2.4.4-1.1.
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