Bug 2526313 (CVE-2026-61911) - CVE-2026-61911 cyrus-imapd: cyrus-imapd: Sieve fileinto mailbox existence oracle
Summary: CVE-2026-61911 cyrus-imapd: cyrus-imapd: Sieve fileinto mailbox existence oracle
Keywords:
Status: NEW
Alias: CVE-2026-61911
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2531318
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-08-31 14:14 UTC by OSIDB Bzimport
Modified: 2026-09-10 08:37 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-08-31 14:14:34 UTC 
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.
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