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CVE WatchOct 16, 2026

CVE-2026-86009

Mailu is a mail server distributed as a set of Docker images. Prior to f05aeb8322e2f61096af6b089d61ba6f40587d96, domain managers can enable

CVSS

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No CVSS

EPSS

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KEV

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Exploit Today

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0-100

Published: Oct 16, 2026 · Last modified: Oct 16, 2026 · CWE-285 · CWE-863

EPSS · 30d

Not enough EPSS history yet.

Technical description

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.

Official references
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