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CVE Watch10 sept 2026

CVE-2026-61911

An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve

CVSS

4.3

Medio

EPSS

—

KEV

—

Exploit Today

—

0-100

Publicado: 9 sept 2026 · Última mod.: 10 sept 2026 · CWE-497

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

An issue was discovered in Cyrus IMAP before 3.12.4. There is a Sieve mailbox existence oracle. An authenticated user could install a Sieve script that probed whether another user's private mailbox existed, or read the value of shared mailbox annotations, by observing which fileinto branch fired during LMTP delivery.

Referencias oficiales
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