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CVE-2026-47086

LOW
3.5
CVSS Score
Published: July 16, 2026 at 12:00 AM UTC
Updated: October 24, 2026 at 08:10 PM UTC
2 products affected across 1 vendorCyrusimapCyrus IMAP

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Severity
LOW3.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Cyrusimap· Cyrusimap
95%
v < 3.12.3
Affected range stops below 3.12.3, so it looks safe — our inference, not a vendor statement
Cyrus IMAP· Cyrusimap
90%
0 ≤ v < 3.12.30
Affected range stops below 3.12.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

Source: cverecord
https://www.cyrusimap.org/imap/download/release-notes/index.html
Source: cverecord
https://www.cyrusimap.org/3.12/imap/download/release-notes/3.12/x/3.12.3.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.5LOWmitre
Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-863

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