CVE-2026-33606
published 2026-08-28CVE-2026-33606: 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…
PriorityP426medium4.8CVSS 3.1
AVNACHPRLUIRSUCNIHAN
EPSS
0.25%
15.0th percentile
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
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| dovecot | dovecot | — | — |
| open-xchange_gmbh | ox_dovecot_ce | >= 2.3.0 < 2.4.5 | 2.4.5 |
| open-xchange_gmbh | ox_dovecot_pro | >= 2.3.0 < 2.3.22.2 | 2.3.22.2 |
| open-xchange_gmbh | ox_dovecot_pro | >= 3.0.0 < 3.0.7 | 3.0.7 |
| open-xchange_gmbh | ox_dovecot_pro | >= 3.1.0 < 3.1.6 | 3.1.6 |
CVSS provenance
nvdv3.14.8MEDIUMCVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:H/A:N
vendor_redhat4.8MEDIUM
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GHSA
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.
ghsa_unreviewed·2026-08-28
CVE-2026-33606 [MEDIUM] CWE-93 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.
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.
Red Hat
dovecot: Dovecot: Unauthorized mailbox modification via dsync command injection
vendor_redhat·2026-08-28·CVSS 4.8
CVE-2026-33606 [MEDIUM] CWE-78 dovecot: Dovecot: Unauthorized mailbox modification via dsync command injection
dovecot: Dovecot: Unauthorized mailbox modification via dsync command injection
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.
A flaw was found in Dovecot. A malicious user can craft specific mail content that, when an administrator later uses the dsync tool with the stream prot
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-33606 dovecot: Dovecot: Unauthorized mailbox modification via dsync command injection [fedora-all]
bugzilla·2026-09-01·CVSS 4.8
CVE-2026-33606 [MEDIUM] CVE-2026-33606 dovecot: Dovecot: Unauthorized mailbox modification via dsync command injection [fedora-all]
CVE-2026-33606 dovecot: Dovecot: Unauthorized mailbox modification via dsync command injection [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
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
Bugzilla
CVE-2026-33606 dovecot: Dovecot: Unauthorized mailbox modification via dsync command injection
bugzilla·2026-08-28·CVSS 4.8
CVE-2026-33606 [MEDIUM] CVE-2026-33606 dovecot: Dovecot: Unauthorized mailbox modification via dsync command injection
CVE-2026-33606 dovecot: Dovecot: Unauthorized mailbox modification via dsync command injection
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.
2026-08-28
Published