https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Tue, 29 Sep 2026 01:36:33 +0000 https://vulnerability.circl.lu/vuln/fkie_cve-2026-84465 <p>Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when Zammad checks the digital signature on an incoming S/MIME-signed email, it does not verify that the signing certificate is genuinely trusted, it only checks whether a certificate with a matching name is already stored in the system. An attacker can create their own certificate using the name of a real, previously trusted sender and use it to send a forged email. Zammad will display that email with the same &#34;validly signed&#34; indicator as a genuine message from the real sender, even though the attacker never had access to that sender&#39;s actual certificate or private key. This issue is fixed in version 7.1.2.</p> <p>Zammad is a web based open source helpdesk/customer support system. Prior to 7.1.2, when Zammad checks the digital signature on an incoming S/MIME-signed email, it does not verify that the signing certificate is genuinely trusted, it only checks whether a certificate with a matching name is already stored in the system. An attacker can create their own certificate using the name of a real, previously trusted sender and use it to send a forged email. Zammad will display that email with the same &#34;validly signed&#34; indicator as a genuine message from the real sender, even though the attacker never had access to that sender&#39;s actual certificate or private key. This issue is fixed in version 7.1.2.</p> https://vulnerability.circl.lu/vuln/fkie_cve-2026-84465