CVE-2026-47082
Medium
Description
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.
SeverityMedium
CVSS5.4
Exploit probability—
ProductCyrus IMAP
PublishedJul 16, 2026
First seenJul 16, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- cyrusimap Cyrus IMAP3.12.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cyrusimap Cyrus IMAP | v < 3.12.3 | 3.12.3 |
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