Incorrect Authorization Affecting cyrus-imapd package, versions <3.12.3-1


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.3% (22nd percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-CYRUSIMAPD-18001346
  • published17 Jul 2026
  • disclosed16 Jul 2026

Introduced: 16 Jul 2026

CVE-2026-47082  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Debian:unstable cyrus-imapd to version 3.12.3-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cyrus-imapd package and not the cyrus-imapd package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1