Threats Tagged 'ghsa-cf77-42mj-h39j'
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Threats Tagged 'ghsa-cf77-42mj-h39j'
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0 CVE-2026-40203 is a low-severity vulnerability in Open-Xchange GmbH OX Dovecot Pro related to IMAP compression reuse. When IMAP compression is enabled, the compression state is reused across responses in a session, causing response sizes to depend on both attacker-supplied and other mailbox mail. This allows an attacker who can send mail to a user and observe the user's IMAP traffic sizes to confirm if a small message body matches a guessed text. There is no demonstration of recovering arbitrary unknown content. Disabling IMAP compression or updating to a non-vulnerable version mitigates the issue. No public exploits are known. Join the discussion | CVE Database V5 | 08/28/2026, 10:12:22 UTC Added: 08/28/2026, 11:22:50 UTC |
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