CVE-2026-47086

Public on 2026-07-16
Modified on 2026-07-18
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.
Severity
Low severity
Low
See what this means
CVSS v3 Base Score
3.5
See breakdown

Affected Packages

Platform Package Release Date Advisory Status
Amazon Linux 2 - Core cyrus-imapd Pending Fix

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 3.5 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N

References

FAQs regarding Amazon Linux ALAS/CVE Severity Red Hat: CVE-2026-47086 Mitre: CVE-2026-47086