CVE-2026-47086

LOW

Cyrusimap Cyrus Imap < 3.12.3 - Incorrect Authorization

Title source: rule

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.

References (2)

Core 2

Core 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

Scores

CVSS v3 3.5

EPSS 0.0018

EPSS Percentile 7.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-863

Status published

Products (1)

cyrusimap/Cyrus IMAP < 3.12.3

Published Jul 16, 2026

Tracked Since Jul 17, 2026