Bug 2501449 (CVE-2026-47082) - CVE-2026-47082 cyrus-imapd: Cyrus IMAP: ACL bypass in vacation 'fcc' feature allows unauthorized mailbox writes
Summary: CVE-2026-47082 cyrus-imapd: Cyrus IMAP: ACL bypass in vacation 'fcc' feature ...
Keywords:
Status: NEW
Alias: CVE-2026-47082
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: 2501668
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-16 19:01 UTC by OSIDB Bzimport
Modified: 2026-07-17 04:00 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-07-16 19:01:31 UTC 
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. The vacation "fcc" feature skips the destination-mailbox ACL. A user whose vacation Sieve script used :fcc (to save a copy of the sent message) could deliver vacation auto-reply copies into any mailbox the script could name, regardless of whether the script owner had insert permissions on the destination mailbox.
Note You need to log in before you can comment on or make changes to this bug.