Low severity3.5NVD Advisory· Published Jul 16, 2026· Updated Jul 17, 2026
CVE-2026-47086
CVE-2026-47086
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.
Affected products
2- Range: <=3.12.2
Patches
Vulnerability mechanics
References
2News mentions
1- Cyrus IMAP: Nine Access Control and Auth Bypass Vulnerabilities Disclosed TogetherVypr Intelligence · Jul 17, 2026