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    <link>https://cve.radiocsirt.org</link>
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      <title>certfr-2026-avi-0052 — De multiples vulnérabilités ont été découvertes dans Mattermost Server. Elles permettent à un attaquant de provoquer un…</title>
      <link>https://cve.radiocsirt.org/vuln/certfr-2026-avi-0052</link>
      <description>certfr-2026-avi-0052</description>
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      <title>EUVD-2026-268307</title>
      <link>https://cve.radiocsirt.org/vuln/euvd-2026-268307</link>
      <description>EUVD-2026-268307</description>
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      <title>fkie_cve-2026-20796</title>
      <link>https://cve.radiocsirt.org/vuln/fkie_cve-2026-20796</link>
      <description>&lt;p&gt;Mattermost versions 10.11.x &amp;lt;= 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /common_teams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;Mattermost versions 10.11.x &amp;lt;= 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /common_teams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549&lt;/p&gt;</content:encoded>
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      <title>GHSA-2xf7-hmf6-p64j — Mattermost doesn't properly validate channel membership at the time of data retrieval</title>
      <link>https://cve.radiocsirt.org/vuln/ghsa-2xf7-hmf6-p64j</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Go: github.com/mattermost/mattermost-server&lt;/p&gt;
&lt;p&gt;Mattermost versions 10.11.x &amp;lt;= 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /common_teams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Go: github.com/mattermost/mattermost-server&lt;/p&gt;
&lt;p&gt;Mattermost versions 10.11.x &amp;lt;= 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /common_teams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549&lt;/p&gt;</content:encoded>
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