Incorrect Authorization Affecting cyrus-imapd package, versions <3.6.1-4+deb12u5


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.27% (19th percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk IDSNYK-ECHOLATEST-CYRUSIMAPD-18000851
  • published17 Jul 2026
  • disclosed16 Jul 2026

Introduced: 16 Jul 2026

CVE-2026-47086  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Echo:latest cyrus-imapd to version 3.6.1-4+deb12u5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream cyrus-imapd package and not the cyrus-imapd package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1