CVE-2026-47088 | An issue was discovered in cyrus-imapd in Cyrus IMAP through… | CVSS 3.1 LOW

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.

Metadata

CVE ID: CVE-2026-47088
State: PUBLISHED
Assigner: mitre
Reserved: 2026-05-18 00:00 UTC
Published: 2026-07-16 00:00 UTC
Last updated: 2026-07-16 19:01 UTC
Primary CWE: CWE-126
CWE-126 Buffer Over-read
Vendor / Product: cyrusimap / Cyrus IMAP
Sources: cve.org · NVD

Severity & Metrics

3.1 LOW CVSS 3.1

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

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-126	cna	CWE-126 Buffer Over-read

CVSS scores (1)

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

References (2)