CVE-2026-47086

Published: Jul 16, 2026Modified: Jul 17, 2026Deferred

3.5

Vector

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

Exploitability: 1.8 / Impact: 1.4

Source: MITRE (Secondary)

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.

Related CWEs

CWE-863

Incorrect Authorization

The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.

References (2)

https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html

Source: cve@mitre.org

https://www.cyrusimap.org/imap/download/release-notes/index.html

Source: cve@mitre.org

Timeline

No history available yet.