CVE-2026-52681
CVSS Score
3.1
EPSS Score
0.0%
EPSS Percentile
0th
Sieve CPU resource usage is tracked in the compiled script, so an attacker that has valid credentials can reset the accounting by repeatedly changing the active script. Compiled script files are also not removed when a script is deleted or renamed. The configured Sieve CPU limit can be bypassed, allowing sustained CPU consumption, and the leftover files increase disk consumption. Both can cause degradation of service for mail delivery. Monitor system for abnormal CPU usage and disk consumption. Update to non-vulnerable version. No publicly available exploits are known.
| CWE | CWE-1050 |
| Vendor | open-xchange gmbh |
| Product | ox dovecot pro |
| Published | Aug 28, 2026 |
| Last Updated | Aug 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
Open-Xchange GmbH / OX Dovecot Pro
2.3.15 < 2.3.22.2 3.0.0 < 3.0.7 3.1.0 < 3.1.6
Open-Xchange GmbH / OX Dovecot CE
2.3.15 < 2.4.5