CVE-2026-47082
published 2026-07-16CVE-2026-47082: 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…
PriorityP429medium5.4CVSS 3.1
AVNACLPRLUINSUCNILAL
EPSS
0.30%
22.3th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cyrusimap | cyrus_imap | < 3.12.3 | 3.12.3 |
| debian | cyrus-imapd | — | — |
CVSS provenance
nvdv3.15.4MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
vendor_redhat5.4MEDIUM
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GHSA
An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2.
ghsa_unreviewed·2026-07-16
CVE-2026-47082 [MEDIUM] CWE-863 An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2.
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.
Red Hat
cyrus-imapd: Cyrus IMAP: ACL bypass in vacation 'fcc' feature allows unauthorized mailbox writes
vendor_redhat·2026-07-16·CVSS 5.4
CVE-2026-47082 [MEDIUM] CWE-279 cyrus-imapd: Cyrus IMAP: ACL bypass in vacation 'fcc' feature allows unauthorized mailbox writes
cyrus-imapd: Cyrus IMAP: ACL bypass in vacation 'fcc' feature allows unauthorized mailbox writes
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.
A flaw was found in Cyrus IMAP's cyrus-imapd component. A user with low privileges can exploit a vulnerability in the vacation "fcc" feature. By crafting a specific Sieve script, the user can bypass access control lists and deliver vacation auto-reply messages into any mailbox, leading to unauthorized modification o
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-47082 cyrus-imapd: Cyrus IMAP: ACL bypass in vacation 'fcc' feature allows unauthorized mailbox writes [fedora-all]
bugzilla·2026-07-17·CVSS 5.4
CVE-2026-47082 [MEDIUM] CVE-2026-47082 cyrus-imapd: Cyrus IMAP: ACL bypass in vacation 'fcc' feature allows unauthorized mailbox writes [fedora-all]
CVE-2026-47082 cyrus-imapd: Cyrus IMAP: ACL bypass in vacation 'fcc' feature allows unauthorized mailbox writes [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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.
Bugzilla
CVE-2026-47082 cyrus-imapd: Cyrus IMAP: ACL bypass in vacation 'fcc' feature allows unauthorized mailbox writes
bugzilla·2026-07-16·CVSS 5.4
CVE-2026-47082 [MEDIUM] CVE-2026-47082 cyrus-imapd: Cyrus IMAP: ACL bypass in vacation 'fcc' feature allows unauthorized mailbox writes
CVE-2026-47082 cyrus-imapd: Cyrus IMAP: ACL bypass in vacation 'fcc' feature allows unauthorized mailbox writes
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.
2026-07-16
Published