CVE-2026-47086

State: Published
Severity: 3.5 Low
Published: Jul 16, 2026
Updated: Jul 16, 2026
Reserved: May 18, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	3.5 Low	CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N	mitre

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
Cyrus IMAPcyrusimap	before 3.12.3Affected

References

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

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