CVE-2026-47082 | An issue was discovered in cyrus-imapd in Cyrus IMAP through… | CVSS 5.4 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.

Metadata

CVE ID: CVE-2026-47082
State: PUBLISHED
Assigner: mitre
Reserved: 2026-05-18 00:00 UTC
Published: 2026-07-16 00:00 UTC
Last updated: 2026-07-16 18:49 UTC
Primary CWE: CWE-863
CWE-863 Incorrect Authorization
Vendor / Product: cyrusimap / Cyrus IMAP
Sources: cve.org · NVD

Severity & Metrics

5.4 MEDIUM CVSS 3.1

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

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
cyrusimap	Cyrus IMAP	—	0 < 3.12.3

Weakness (CWE)

CWE	Source	Description
CWE-863	cna	CWE-863 Incorrect Authorization

CVSS scores (1)

Score	Severity	Version	Source	Vector
5.4	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L

References (2)