Upstream information

CVE-2026-47085 at MITRE

Description

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. URLAUTH token forgery can occur via a missing mboxkey. If an attacker knew a folder name on the victim's account for which the victim had never issued an auth URL, they could forge a working URLAUTH token by computing an HMAC-SHA1 value with a predictable key, giving them read access to the mailbox. (URLAUTH is an obscure feature, meaning that the odds of any user actually being susceptible to this attack are very low. Perhaps no public clients use URLAUTH.)

SUSE information

Overall state of this security issue: Resolved

This issue is currently rated as having moderate severity.

CVSS v3 Scores
CVSS detail CNA (MITRE)
Base Score 4
Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N
Attack Vector Network
Attack Complexity High
Privileges Required None
User Interaction None
Scope Changed
Confidentiality Impact Low
Integrity Impact None
Availability Impact None
CVSSv3 Version 3.1
SUSE Bugzilla entry: 1271621 [NEW]

No SUSE Security Announcements cross referenced.

List of released packages

Product(s) Fixed package version(s) References
openSUSE Leap 16.0
  • cyradm >= 3.8.7-bp160.1.1
  • cyrus-imapd >= 3.8.7-bp160.1.1
  • cyrus-imapd-devel >= 3.8.7-bp160.1.1
  • cyrus-imapd-snmp >= 3.8.7-bp160.1.1
  • cyrus-imapd-snmp-mibs >= 3.8.7-bp160.1.1
  • cyrus-imapd-utils >= 3.8.7-bp160.1.1
  • libcyrus0 >= 3.8.7-bp160.1.1
  • perl-Cyrus-Annotator >= 3.8.7-bp160.1.1
  • perl-Cyrus-IMAP >= 3.8.7-bp160.1.1
  • perl-Cyrus-SIEVE-managesieve >= 3.8.7-bp160.1.1
 Patchnames:
openSUSE-Leap-16.0-packagehub-428

SUSE Timeline for this CVE

CVE page created: Fri Jul 17 11:36:50 2026
CVE page last modified: Sat Jul 18 11:44:35 2026