Bug 2501461 (CVE-2026-47086) - CVE-2026-47086 cyrus-imapd: cyrus-imapd: Information disclosure via URLAUTH token bypass of Access Control Lists
Summary: CVE-2026-47086 cyrus-imapd: cyrus-imapd: Information disclosure via URLAUTH t...
Keywords:
Status: NEW
Alias: CVE-2026-47086
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2507451 2507453
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-16 19:02 UTC by OSIDB Bzimport
Modified: 2026-07-27 13:01 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-07-16 19:02:12 UTC 
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.
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