cyrusimap Cyrus IMAP up to 3.12.2 URLAUTH Token permission

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in cyrusimap Cyrus IMAP up to 3.12.2. This affects an unknown function of the component URLAUTH Token Handler. Executing a manipulation can lead to permission. This vulnerability appears as CVE-2026-47086. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in cyrusimap Cyrus IMAP up to 3.12.2. It has been declared as problematic. This vulnerability affects an unknown functionality of the component URLAUTH Token Handler. The manipulation with an unknown input leads to a permission vulnerability. The CWE definition for the vulnerability is CWE-275. As an impact it is known to affect confidentiality. CVE summarizes:

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 advisory is available at cyrusimap.org. This vulnerability was named CVE-2026-47086 since 05/18/2026. The exploitation appears to be easy. The attack can be initiated remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 327811 (openSUSE 16: cyradm / cyrus-imapd / cyrus-imapd-devel / cyrus-imapd-snmp / etc (openSUSE-SU-2026:21368-1)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.12.3 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (327811) and CERT Bund (WID-SEC-2026-2387). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

  • Open Source cyrus imapd

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Permission
CWE: CWE-275 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 327811
Nessus Name: openSUSE 16: cyradm / cyrus-imapd / cyrus-imapd-devel / cyrus-imapd-snmp / etc (openSUSE-SU-2026:21368-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Upgrade: Cyrus IMAP 3.12.3

Timelineinfo

05/18/2026 CVE reserved
07/16/2026 +59 days Advisory disclosed
07/16/2026 +0 days VulDB entry created
07/19/2026 +3 days VulDB entry last update

Sourcesinfo

Advisory: cyrusimap.org
Status: Confirmed

CVE: CVE-2026-47086 (🔒)
GCVE (CVE): GCVE-0-2026-47086
GCVE (VulDB): GCVE-100-379618
CERT Bund: WID-SEC-2026-2387 - cyrus imap: Mehrere Schwachstellen

Entryinfo

Created: 07/16/2026 21:11
Updated: 07/19/2026 15:47
Changes: 07/16/2026 21:11 (53), 07/17/2026 11:17 (7), 07/19/2026 15:47 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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