CVE-2026-47086CWE-863

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2

Low · published July 16, 2026

CVSS v3.1
3.5
EPSS
0%
Percentile
17.8
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
3.5 · LOW
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00267 · 17.8th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-07-16T00:00Z
EPSS history
Timeline
  • 16 JUL 00:00Z
    An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2
    cvelistv5