CVE-2026-47082

MEDIUM

Cyrusimap Cyrus Imap < 3.12.3 - Incorrect Authorization

Title source: rule

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.

References (2)

Core 2

Core References

https://www.cyrusimap.org/imap/download/release-notes/index.html

https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html

Scores

CVSS v3 5.4

EPSS 0.0020

EPSS Percentile 9.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-863

Status published

Products (1)

cyrusimap/Cyrus IMAP < 3.12.3

Published Jul 16, 2026

Tracked Since Jul 17, 2026