Threats Tagged 'ghsa-cf77-42mj-h39j'
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Threats Tagged 'ghsa-cf77-42mj-h39j'
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CVE-2026-40203: Exposure of Sensitive Information to an Unauthorized Actor in Open-Xchange GmbH OX Dovecot ProCVE-2026-40203 0 When IMAP compression is enabled, the same compression state is reused across responses in a session, so response sizes depend on both attacker-supplied mail and other mail in the same mailbox. An attacker that can send mail to a user and can also observe the sizes of that user's IMAP traffic can confirm whether the body of a small message matches a guessed text. Recovery of arbitrary unknown content was not demonstrated, but the attack can disclose whether a secret-like message body matches a candidate. Disable IMAP compression. Update to non-vulnerable version. No publicly available 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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