Threats Tagged 'cve-2026-39971'
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Threats Tagged 'cve-2026-39971'
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Serendipity versions prior to 2.6.0 contain a vulnerability where the HTTP Host header is improperly sanitized before being inserted into the Message-ID SMTP header during email sending. This allows an attacker controlling the Host header to inject arbitrary SMTP headers into outgoing emails, potentially enabling identity spoofing, reply hijacking, and email reputation abuse. The issue is fixed in version 2.6.0. Join the discussion | CVE Database V5 | 04/14/2026, 23:35:49 UTC Added: 04/15/2026, 00:01:58 UTC |
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