Skip to content
Heist/ feed
High

Mailu: Domain managers can allow themselves to spoof on other hosted domains they should not control

Type: advisorySource: Official CVE List1 source record

Mailu is a mail server distributed as a set of Docker images. Prior to f05aeb8322e2f61096af6b089d61ba6f40587d96, domain managers can enable spoofing for hosted domains they do not control. A potentially malicious domain administrator enables spoofing for another hosted domain and can send emails that are authenticated with DKIM/SPF for domains they should not be able to. This vulnerability is addressed by f05aeb8322e2f61096af6b089d61ba6f40587d96.

Announced Source revision 1
Original source ↗

CVE-2026-86009

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-86009

Mailu

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "Mailu",
    "product": "Mailu",
    "versions": [
      {
        "status": "affected",
        "version": "< f05aeb8322e2f61096af6b089d61ba6f40587d96"
      }
    ]
  }
]
Related CVEs
CVE-2026-86009

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#45042 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement