An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.
History

Sat, 18 Jul 2026 12:15:00 +0000

Type Values Removed Values Added
Title cyrus-imapd: Cyrus IMAP: Information disclosure via heap exposure in MIME comment parsing
Weaknesses CWE-125
References
Metrics threat_severity

None

threat_severity

Low


Thu, 16 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 16 Jul 2026 18:45:00 +0000

Type Values Removed Values Added
Description An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.
First Time appeared Cyrusimap
Cyrusimap cyrus Imap
Weaknesses CWE-126
CPEs cpe:2.3:a:cyrusimap:cyrus_imap:*:*:*:*:*:*:*:*
Vendors & Products Cyrusimap
Cyrusimap cyrus Imap
References
Metrics cvssV3_1

{'score': 3.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-07-16T00:00:00.000Z

Updated: 2026-07-16T19:01:31.618Z

Reserved: 2026-05-18T00:00:00.000Z

Link: CVE-2026-47088

cve-icon Vulnrichment

Updated: 2026-07-16T19:01:27.907Z

cve-icon NVD

No data.

cve-icon Redhat

Severity : Low

Publid Date: 2026-07-16T00:00:00Z

Links: CVE-2026-47088 - Bugzilla