CVE-2026-33586
2026-10-07
16h17 +00:00
16h17 +00:00
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Mô tả CVE
Authenticated users are able to manipulate both the SMTP
envelope “Envelope-from” and “From” fields when sending
emails through OVH mail servers.
Due to OVH's default SPF configuration, which
commonly includes include:mx.ovh.com, any authenticated user with a
valid OVH email account can send messages that appear to originate from any
OVH-hosted domains using the default SPF record. Since the SPF policy
explicitly authorizes OVH mail servers (mx.ovh.com) to send mail on behalf of
these domains, forged messages successfully pass SPF validation despite
not being authorized by the impersonated domain owner.
Thông tin CVE
Điểm yếu liên quan
| Tên điểm yếu | Nguồn | |
|---|---|---|
| Authentication Bypass by Spoofing This attack-focused weakness is caused by incorrectly implemented authentication schemes that are subject to spoofing attacks. |
||
| Origin Validation Error The product does not properly verify that the source of data or communication is valid. |
||
| Initialization of a Resource with an Insecure Default The product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure. |
