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CVE-2026-47086 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

Description

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. GENURLAUTH-issued tokens can bypass ACLs. Any authenticated user could mint a URLAUTH token (via the GENURLAUTH command) for any mailbox they could name, even without read access on it. This would allow reading mail from mailboxes despite having no granted permissions.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:4.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CNA: [email protected]CVSS-B:3.5 LOWVector:CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html	[email protected]	AdvisoryBundleRelease NotesVendor
https://www.cyrusimap.org/imap/download/release-notes/index.html	[email protected]	Vendor

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-863	Incorrect Authorization	[email protected]

Affected Products

Product	Versions
Cyrus IMAP	<= 3.12.2 (semver)
CPE cpe:2.3:a:cyrus:imap:::::::: cpe:2.3:a:cyrusimap:cyrus_imap:::::::: Remediation Upgrade: 3.12.3moderate efforthttps://github.com/cyrusimap/cyrus-imapd/releases/download/cyrus-imapd-3.12.3/cyrus-imapd-3.12.3.tar.gz

Change History

2 change records found show changes

Date	Action	Recorded By
Jul 16, 2026	New CVE Received	[email protected]
Jul 16, 2026	CVE Modified	CISA-ADP