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      <title>CVE-2026-6961 — CVE-2026-6961: Path traversal via unsanitized FileInfo.Name in Mattermost federation sync</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-6961</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Mattermost&lt;/p&gt;
&lt;p&gt;Mattermost versions 11.6.x &amp;lt;= 11.6.1, 11.5.x &amp;lt;= 11.5.4, 10.11.x &amp;lt;= 10.11.15, 10.11.x &amp;lt;= 10.11.16 Mattermost fails to sanitize FileInfo.Name received from federated peers during shared channel file sync, which allows an attacker who controls a federated server to write files to arbitrary locations within the target server&amp;#39;s filestore via path traversal sequences in the filename field.. Mattermost Advisory ID: MMSA-2026-00661&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Mattermost&lt;/p&gt;
&lt;p&gt;Mattermost versions 11.6.x &amp;lt;= 11.6.1, 11.5.x &amp;lt;= 11.5.4, 10.11.x &amp;lt;= 10.11.15, 10.11.x &amp;lt;= 10.11.16 Mattermost fails to sanitize FileInfo.Name received from federated peers during shared channel file sync, which allows an attacker who controls a federated server to write files to arbitrary locations within the target server&amp;#39;s filestore via path traversal sequences in the filename field.. Mattermost Advisory ID: MMSA-2026-00661&lt;/p&gt;</content:encoded>
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