CVE-2026-33606

Summary

Mail content stored by a user can be crafted so that it is interpreted as dsync protocol commands when an administrator later runs dsync with the stream protocol, for example during a migration. Injected commands can modify mailbox state on the destination during migration or replication, including internal mailbox attributes that a user should not be able to set directly. It can also cause dsync errors. Avoid running dsync with the stream protocol on mailboxes with untrusted content. Update to non-vulnerable version. No publicly available exploits are known.

Affected Software

VendorProductVersion RangeStatus
Open-Xchange GmbHOX Dovecot Pro2.3.0 < 2.3.22.2affected
Open-Xchange GmbHOX Dovecot Pro3.0.0 < 3.0.7affected
Open-Xchange GmbHOX Dovecot Pro3.1.0 < 3.1.6affected
Open-Xchange GmbHOX Dovecot CE2.3.0 < 2.4.5affected

Weaknesses

  • CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References